Dimensions; Digital Communications; Modbus Protocol - Optex TC-Mi Instruction Manual

10

Dimensions

Mounting holes: ø7
147
OUT IN
Drain
116
Applicable cable
144 diameter: ø6 to 8
30
259
200
16 35
Mounting pitch: 230
(Unit: mm)
11

Digital communications

◆Communication Method
Item Description
Compliant Standard Based on EIA RS-485
Transmission Method 2-wire, semi-duplicate
MODBUS RTU 1 (default)
OM1
MODBUS ASCII 1
MODBUS RTU 2
Protocol
OM2
MODBUS ASCII 2
TC-Mi protocol
Baud rate 9600 (default) / 14400 / 19200 / 38400 bps
Data bits 8 bit
Start bits 1 bit
Stop bits 1 bit
Parity bit None (default) / Odd / Even
Slave address
1 (default) to 247
MODBUS only
1

MODBUS protocol

◆Frame Configuration
Mode Start Slave address
RTU 1 byte
：
ASCII 2 chars
Item Mode
RTU 3.5 chare silence
Start
ASCII "："character
3.5 chare silence
RTU
End
ASCII "CR","LF" character
1 to 247
Slave address Common
OM1 RTU/ASCII 4, 6
Function code
OM2 RTU/ASCII 3,16
RTU 0-N bytes with response data from the device.
Data
0-N bytes with response data from the device in hex characters.
ASCII
RTU CRC
Error check
ASCII LRC
Mode Function Code
4 Read registers.
OM1
6 Write resisters.
3 Read registers.
OM2
16 Write resisters.
Function code Error check
Data
1 byte n byte 2 byte
2 chars n chars 2 chars
Description
Description
End
CR, LF
31