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Created page with "=== Master MODE === ==== RTU ==== ===== MODBUS_RTU_CFG ===== Set bus parameters {| class="wikitable" |- |in |Bus |string | |path to bus device (BUS1 = "/dev/ttyS3" or BUS2 =..."

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=== Master MODE ===

==== RTU ====

===== MODBUS_RTU_CFG =====
Set bus parameters
{| class="wikitable"
|-
|in
|Bus
|string
|
|path to bus device (BUS1 = "/dev/ttyS3" or BUS2 = "/dev/ttyS2")
|-
|in
|Baud
|int
|
|standard baudrates from 150 to 115200 (allowed speeds: 150, 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 38400, 57600, 115200, 1000000)
|-
|in
|Parity
|string[1]
|
|"N" = none, "E" = even, "O" = odd
|-
|in
|Databit
|USINT
|
|Databits (5,6,7,8)
|-
|in
|Stopbit
|USINT
|
|Stopbits (1,2)
|-
|out
|ERR
|bool
|
|indicates some error occurs (0 = OK)
|-
|out
|ERR_ID
|WORD
|
|identifies occured error by unique code
|}

===== MODBUS_RTU_STATS =====
The block provides statistical information on the responses from the slave that do not arrive on time. This is useful when debugging timeouts.
{| class="wikitable"
|in
|Bus
|string
|path to bus device (BUS1 = "/dev/ttyS3" or BUS2 = "/dev/ttyS2")
|-
|out
|TIMEOUT_CNT
|UDINT
|A counter of responses that do not arrive within the time limit.
|-
|out
|FLUSH_CNT
|UDINT
|A counter of responses that arrive after a timeout.
|-
|out
|DBG_TEXT
|string[255]
|String of the last flushed data.
|}
Example of usage:

[[File:Modbus rtu stats usage.jpg]]

===== MODBUS_RTU_R_COIL =====
Reads one coil register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|bool
|
|readed value
|}

===== MODBUS_RTU_R_COIL_8 =====
Reads up to 8 coil registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_RTU_R_DISCRETE =====
Read one discrete input register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|bool
|
|readed value
|}

===== MODBUS_RTU_R_DISCRETE_8 =====
Read up to 8 discrete input registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_RTU_R_HOLDING =====
Reads one holding register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|word
|
|readed value
|}

===== MODBUS_RTU_R_HOLDING_8 =====
Reads up to 8 holding registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_RTU_R2_HOLDING =====
Reads two holding registers as 32bit number (lower register with higher weight)

{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|dword
|
|readed value
|}

===== MODBUS_RTU_R_INPUT =====
Reads one input register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|word
|
|readed value
|}

===== MODBUS_RTU_R_INPUT_8 =====
Reads up to 8 input registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_RTU_R2_INPUT =====
Reads two input registers as 32bit number (lower register with higher weight)
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|out
|Q
|dword
|
|readed value
|}

===== MODBUS_RTU_W_COIL =====
Writes value to one coil register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|in
|VAL
|bool
|
|value to write
|}

===== MODBUS_RTU_W_COIL_8 =====
Writes value to up to 8 coil registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to write (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|in
|VAL1
|bool
|
|value to write to 1st register
|-
|in
|VAL2
|bool
|
|value to write to 2nd register
|-
|in
|VAL3
|bool
|
|value to write to 3rd register
|-
|in
|VAL4
|bool
|
|value to write to 4th register
|-
|in
|VAL5
|bool
|
|value to write to 5th register
|-
|in
|VAL6
|bool
|
|value to write to 6th register
|-
|in
|VAL7
|bool
|
|value to write to 7th register
|-
|in
|VAL8
|bool
|
|value to write to 8th register
|}

===== MODBUS_RTU_W_HOLDING =====
Writes value to one holding register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|in
|VAL
|word
|
|value to write
|}

===== MODBUS_RTU_W_HOLDING_8 =====
Writes value to up to 8 holding registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to write (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|in
|VAL1
|bool
|
|value to write to 1st register
|-
|in
|VAL2
|bool
|
|value to write to 2nd register
|-
|in
|VAL3
|bool
|
|value to write to 3rd register
|-
|in
|VAL4
|bool
|
|value to write to 4th register
|-
|in
|VAL5
|bool
|
|value to write to 5th register
|-
|in
|VAL6
|bool
|
|value to write to 6th register
|-
|in
|VAL7
|bool
|
|value to write to 7th register
|-
|in
|VAL8
|bool
|
|value to write to 8th register
|}

===== MODBUS_RTU_W2_HOLDING =====
Writes value to two holding registers (lower register with higher weight)
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|Bus
|string
|
|path to bus device (/dev/ttyS0)
|-
|in
|UnitID
|byte
|
|device bus address (0-247)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 250ms)
|-
|in
|VAL
|dword
|
|value to write
|}

==== TCP ====

===== MODBUS_TCP_R_COIL =====
Reads one coil register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|bool
|
|readed value
|}

===== MODBUS_TCP_R_COIL_8 =====
Reads up to 8 coil registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_TCP_R_DISCRETE =====
Read one discrete input register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|bool
|
|readed value
|}

===== MODBUS_TCP_R_DISCRETE_8 =====
Read up to 8 discrete input registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}

===== MODBUS_TCP_R_HOLDING =====
Reads one holding register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|word
|
|readed value
|}
===== MODBUS_TCP_R_HOLDING_8 =====
Reads up to 8 holding registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}
===== MODBUS_TCP_R2_HOLDING =====
Reads two holding registers (lower register with higher weight)
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|dword
|
|readed value
|}
===== MODBUS_TCP_R_INPUT =====
Reads one input register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|word
|
|readed value
|}
===== MODBUS_TCP_R_INPUT_8 =====
Reads up to 8 input registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to read (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q1
|bool
|
|readed value of 1st register
|-
|out
|Q2
|bool
|
|readed value of 2nd register
|-
|out
|Q3
|bool
|
|readed value of 3rd register
|-
|out
|Q4
|bool
|
|readed value of 4th register
|-
|out
|Q5
|bool
|
|readed value of 5th register
|-
|out
|Q6
|bool
|
|readed value of 6th register
|-
|out
|Q7
|bool
|
|readed value of 7th register
|-
|out
|Q8
|bool
|
|readed value of 8th register
|}
===== MODBUS_TCP_R2_INPUT =====
Reads two input registers (lower register with higher weight)
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|out
|Q
|dword
|
|readed value
|}
===== MODBUS_TCP_W_COIL =====
Writes value to one coil register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|in
|VAL
|bool
|
|value to write
|}
===== MODBUS_TCP_W_COIL_8 =====
Writes value to up to 8 coil registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to write (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|in
|VAL1
|bool
|
|value to write to 1st register
|-
|in
|VAL2
|bool
|
|value to write to 2nd register
|-
|in
|VAL3
|bool
|
|value to write to 3rd register
|-
|in
|VAL4
|bool
|
|value to write to 4th register
|-
|in
|VAL5
|bool
|
|value to write to 5th register
|-
|in
|VAL6
|bool
|
|value to write to 6th register
|-
|in
|VAL7
|bool
|
|value to write to 7th register
|-
|in
|VAL8
|bool
|
|value to write to 8th register
|}
===== MODBUS_TCP_W_HOLDING =====
Writes value to one holding register
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|in
|VAL
|word
|
|value to write
|}
===== MODBUS_TCP_W_HOLDING_8 =====
Writes value to up to 8 holding registers
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Count
|byte
|
|number of registers to write (1-8)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|in
|VAL1
|bool
|
|value to write to 1st register
|-
|in
|VAL2
|bool
|
|value to write to 2nd register
|-
|in
|VAL3
|bool
|
|value to write to 3rd register
|-
|in
|VAL4
|bool
|
|value to write to 4th register
|-
|in
|VAL5
|bool
|
|value to write to 5th register
|-
|in
|VAL6
|bool
|
|value to write to 6th register
|-
|in
|VAL7
|bool
|
|value to write to 7th register
|-
|in
|VAL8
|bool
|
|value to write to 8th register
|}

===== MODBUS_TCP_W2_HOLDING =====
Writes value to two holding registers (lower register with higher weight)
{| class="wikitable"
| colspan="5" |[[#Asynchronous operations|Asynchronous interface]] - internal implementation
|-
|in
|IP
|string
|
|IP address of slave device (syntax: "aaa.bbb.ccc.ddd")
|-
|in
|Port
|int
|
|TCP port of slave device (default: 502)
|-
|in
|UnitID
|byte
|
|Device bus address (default: 1)
|-
|in
|OfsAdr
|word
|
|register address (1-9999)
|-
|in
|Timeout
|byte
|
|timeout in seconds (default: 1s)
|-
|in
|VAL
|dword
|
|value to write
|}

Master Mode - Revision history

Z033: Created page with "=== Master MODE === ==== RTU ==== ===== MODBUS_RTU_CFG ===== Set bus parameters {| class="wikitable" |- |in |Bus |string | |path to bus device (BUS1 = "/dev/ttyS3" or BUS2 =..."