ABB OTM C 21D User Manual

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AUTOMATIC TRANSFER SWITCH, OTM_C_21D
OTM_C21D can achieve communication function
by using the optional external Modbus RTU
module.
—
3.5 Modbus communication function
Figure 10. Modbus RTU communication module
3.5.1 Modbus parameters
Parameter Value
Modbus Address 1…32 (Default 1)
Modbus Baud Rate 4800bps
9600bps (Default)
19200bps
38400bps
Modbus Stop Bits 1 Stop Bit (Default)
2 Stop Bits
Modbus Parity None
Odd
Even (Default)
Local/Remote Local monitoring mode (Default)
Remote control mode
Table 2. Modbus parameters of OTM_C21D
3.5.2 Modbus functional code
Function code Name
03(0x03) Read Holding Registers
04(0x04) Read Input Registers
06(0x06) Write Single Register
16(0x10) Write Multiple Registers
17(0x11) Report Slave ID
Table 3. Modbus functional code

ABB OTM C 21D Specifications

General

Brand	ABB
Model	OTM C 21D
Category	Switch
Language	English