BI8.1
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 the 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
Device ID: 1
Baudrate: 115 200
Parity: None
Data bits: 8
Stop bits: 1
| Subject | Channel | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|---|
| States of Balanced Inputs |
Balanced Input 1 | AI#01 | u16 | R | 1000 = 1000 Ω 0 = 0 Ω |
5001 |
| Balanced Input 2 | AI#02 | u16 | R | 5002 | ||
| Balanced Input 3 | AI#03 | u16 | R | 5003 | ||
| Balanced Input 4 | AI#04 | u16 | R | 5004 | ||
| Balanced Input 5 | AI#05 | u16 | R | 5005 | ||
| Balanced Input 6 | AI#06 | u16 | R | 5006 | ||
| Balanced Input 7 | AI#07 | u16 | R | 5007 | ||
| Balanced Input 8 | AI#08 | u16 | R | 5008 | ||
| Subject | Channel | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|---|
| States of Inputs and Relay Output |
Balanced Input 1 bin | DI#01 | bit | R | 0 = inactive 1 = active |
3001 |
| Balanced Input 2 bin | DI#02 | bit | R | 3002 | ||
| Balanced Input 3 bin | DI#03 | bit | R | 3003 | ||
| Balanced Input 4 bin | DI#04 | bit | R | 3004 | ||
| Balanced Input 5 bin | DI#05 | bit | R | 3005 | ||
| Balanced Input 6 bin | DI#06 | bit | R | 3006 | ||
| Balanced Input 7 bin | DI#07 | bit | R | 3007 | ||
| Balanced Input 8 bin | DI#08 | bit | R | 3008 | ||
| Input 1 | DI#09 | bit | R | 3009 | ||
| Input 2 | DI#10 | bit | R | 3010 | ||
| Input 3 | DI#11 | bit | R | 3011 | ||
| COIL Relay 1 | DI#12 | bit | R | 3012 | ||
| Inputs | DI#16 - DI#01 | u16 | R | 0x0000 - 0x0FFF | 3001 | |
| Subject | Channel | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|---|
| Relay and OC Outputs |
Relay Output 1 | DO#01 | bit | RW | 0 = inactive 1 = active |
4001 |
| Open Collector 1 | DO#02 | bit | RW | 4002 | ||
| Open Collector 2 | DO#03 | bit | RW | 4003 | ||
| Outputs | DI#16 - DI#01 | u16 | RW | 0x0000 - 0x0007 | 4001 | |
| Subject | Type | R/W | Value | Offset | |
|---|---|---|---|---|---|
| Device Identity |
Product Type | u8[3] | R | 1002-04 | |
| Serial Number | u32 | R | 1005-06 | ||
| PCB Version | u32 | R | 1007-08 | ||
| PCB Revision | u16 | R | 1009 | ||
| FW Version Major | u16 | R | 1010 | ||
| FW Version Minor | u16 | R | 1011 | ||
| FW Version - Revision | u32 | R | 1012-13 | ||
| IF#01 Slot State | u16 | R | 0 = N/A 1 = IF#01 not Inserted 2 = IF#01 Inserted, CRC error 3 = IF#01 Inserted, CRC OK |
1021 | |
| IF#01 Product Type | u8[3] | R | 1022-24 | ||
| IF#01 Serial Number | u32 | R | 1025-26 | ||
| IF#01 PCB Version | u32 | R | 1027-28 | ||
| IF#01 PCB Revision | u16 | R | 1029 | ||
| Device Control |
Reset | u16 | RW | 55203 = To Reboot | 1201 |
| Bootloader / Application | u16 | R | 0x00A – Application, 0x00B – Bootloader |
1203 | |
| Restart to Bootloader | u16 | RW | 617 = To Bootloader else = deactivate bootloader |
1204 | |
| Device Status |
Board Power Voltage | u16 | R | 105 = 10,5V | 1311 |
| Board Temperature | u16 | R | -200 = -20,0°C 250 = 25,0°C |
1321 | |
Note: To activate the bootloader, it is necessary to write a value 617 into the registry with an offset 1204 and restart the device.
