Difference between revisions of "Buses"
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Data bits: 8 <br /> | Data bits: 8 <br /> | ||
Stop bits: 1 <br /> | Stop bits: 1 <br /> | ||
| + | |||
| + | <!-- MODBUS "BUS 0 Settings" registers table --> | ||
| + | {| class="wikitable" | ||
| + | |- | ||
| + | |- style="font-size: 17px;" | ||
| + | ! colspan="2" | Subject !! style="width: 30px;" | Type !! style="width: 30px;" | R/W !! style="width: 230px;" | Value !! style="width: 60px;" | Offset | ||
| + | |- | ||
| + | | rowspan="10" style="width: 90px;" | <span style="font-size: 17px;"> '''BUS 0 <br /> (Internal) <br /> Settings''' </span> | ||
| + | || Baudrate || u16 || RW || 192 = 19 200 bps <br /> 1152 = 115 200 bps <br /> 9246 = 921 600 bps <br /> 10000 = 1 000 000bps || 2010 | ||
| + | |- | ||
| + | | style="width: 244px;" | Databits || u16 || RW || 8 = 8b, 9 = 9b || 2011 | ||
| + | |- | ||
| + | | Parity || u16 || RW || 78 = None <br /> 69 = Even <br /> 79 = Odd || 2012 | ||
| + | |- | ||
| + | | Stop bits || u16 || RW || 10=1, 20=2, 15=1,5 || 2013 | ||
| + | |- | ||
| + | | MODBUS address || u16 || RW || 1 - 247 || 2020 | ||
| + | |} | ||
<!-- MODBUS "BUS 1 Settings" registers table --> | <!-- MODBUS "BUS 1 Settings" registers table --> | ||
Revision as of 14:15, 20 February 2020
Modbus Registers
Below is a list of available MODBUS registers. The same register numbers are also used by the MIOS-2 protocol.
Modbus Read / Write (0x17) Function
METEL IO modules have implemented the MODBUS function (0x17) Read/Write of Multiple registers. Typically it is required to have two separate requests (and responses) for:
1. Writing of outputs via MODBUS function (0x16) Writing Multiple Registers
2. Reading of inputs via MODBUS function (0x03) Read Holding Registers
This requires a total of 4 frames to be sent over MODBUS. If using 0x17 function only one request is needed for the reading and writing of outputs. This requires a total of 2 frames to be sent over MODBUS.
Default Settings of Communication
Baudrate: 115 200
Parity: None
Data bits: 8
Stop bits: 1
| Subject | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|
| BUS 0 (Internal) Settings |
Baudrate | u16 | RW | 192 = 19 200 bps 1152 = 115 200 bps 9246 = 921 600 bps 10000 = 1 000 000bps |
2010 |
| Databits | u16 | RW | 8 = 8b, 9 = 9b | 2011 | |
| Parity | u16 | RW | 78 = None 69 = Even 79 = Odd |
2012 | |
| Stop bits | u16 | RW | 10=1, 20=2, 15=1,5 | 2013 | |
| MODBUS address | u16 | RW | 1 - 247 | 2020 | |
| Subject | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|
| BUS 1 Settings |
Baudrate | u16 | RW | 192 = 19 200 bps 1152 = 115 200 bps 9246 = 921 600 bps 10000 = 1 000 000bps |
2110 |
| Databits | u16 | RW | 8 = 8b, 9 = 9b | 2111 | |
| Parity | u16 | RW | 78 = None 69 = Even 79 = Odd |
2112 | |
| Stop bits | u16 | RW | 10=1, 20=2, 15=1,5 | 2113 | |
| MODBUS address | u16 | RW | 1 - 247 | 2120 | |
| Subject | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|
| BUS 2 Settings |
Baudrate | u16 | RW | 192 = 19 200 bps 1152 = 115 200 bps 9246 = 921 600 bps 10000 = 1 000 000bps |
2210 |
| Databits | u16 | RW | 8 = 8b, 9 = 9b | 2211 | |
| Parity | u16 | RW | 78 = None 69 = Even 79 = Odd |
2212 | |
| Stop bits | u16 | RW | 10=1, 20=2, 15=1,5 | 2213 | |
| MODBUS address | u16 | RW | 1 - 247 | 2220 | |
