Control Techniques Digitax ST Advanced User's Manual page 183

Parameter Keypad and
structure display
17.06 RS485 mode
Digitax ST Variant Plus
Bit SP
Coding
Range 0 to 255
Default 1
Update rate 4ms write
Defines the mode of operation (or protocol) for the on-board EIA-RS485 port.
For details of these modes, refer to Table 5-12 below.
Table 5-12 Serial modes - Pr 17.06
Mode
4-wire CT-ANSI Slave
1
The port is set to 1 start bit, 7 data bits, even parity and 1 stop bit.
2 Reserved
3 Reserved
4 Reserved
2-wire CT-ANSI Slave
5
The port is set to 1 start bit, 7 data bits, even parity and 1 stop bit.
6 User mode. 1 start bit, 7 data bits, EVEN parity, 1 stop bit (10 bits total)
7 User mode. 1 start bit, 8 data bits, EVEN parity, 1 stop bit (11 bits total)
8 User mode. 1 start bit, 8 data bits, NO parity, 1 stop bit (10 bits total)
9 Reserved
10 Reserved
11 Reserved
12 Reserved
4-wire Modbus RTU slave
The EIA-RS485 port is set for:
13,43,73 Mode 13: 1 start bit, 8 data bits, NO parity, 2 stop bits.
Mode 43: 1 start bit, 8 data bits, EVEN parity, 1 stop bit.
Mode 73: 1 start bit, 8 data bits, ODD parity, 1 stop bit.
4-wire Modbus ASCII slave
The EIA-RS485 is set for:
14, 44, 74 Mode 14: 1 start bit, 7 data bits, NO parity, 2 stop bits
Mode 44: 1 start bit, 7 data bits, EVEN parity, 1 stop bit
Mode 74: 1 start bit, 7 data bits, ODD parity, 1 stop bit
2-wire Modbus RTU slave
The EIA-RS485 port is set for:
15, 45, 75 Mode 15: 1 start bit, 8 data bits, NO parity, 2 stop bits.
Mode 45: 1 start bit, 8 data bits, EVEN parity, 1 stop bit.
Mode 75: 1 start bit, 8 data bits, ODD parity, 1 stop bit.
2-wire Modbus ASCII slave
The EIA-RS485 is set for:
16, 46, 76 Mode 16: 1 start bit, 7 data bits, NO parity, 2 stop bits
Mode 46: 1 start bit, 7 data bits, EVEN parity, 1 stop bit
Mode 76: 1 start bit, 7 data bits, ODD parity, 1 stop bit
4-wire Modbus RTU master
The EIA-RS485 port is set for:
17, 47, 77 Mode 17: 1 start bit, 8 data bits, NO parity, 2 stop bits.
Mode 47: 1 start bit, 8 data bits, EVEN parity, 1 stop bit.
Mode 77: 1 start bit, 8 data bits, ODD parity, 1 stop bit.
4-wire Modbus ASCII master
The EIA-RS485 is set for:
18, 48, 78 Mode 18: 1 start bit, 7 data bits, NO parity, 2 stop bits
Mode 48: 1 start bit, 7 data bits, EVEN parity, 1 stop bit
Mode 78: 1 start bit, 7 data bits, ODD parity, 1 stop bit
2-wire Modbus RTU master
The EIA-RS485 port is set for:
19, 49, 79 Mode 19: 1 start bit, 8 data bits, NO parity, 2 stop bits.
Mode 49: 1 start bit, 8 data bits, EVEN parity, 1 stop bit.
Mode 79: 1 start bit, 8 data bits, ODD parity, 1 stop bit.
2-wire Modbus ASCII master
The EIA-RS485 is set for:
20, 50, 80 Mode 20: 1 start bit, 7 data bits, NO parity, 2 stop bits
Mode 50: 1 start bit, 7 data bits, EVEN parity, 1 stop bit
Mode 80: 1 start bit, 7 data bits, ODD parity, 1 stop bit
Motion Processor CT-Sync Master
25
The baud rate is fixed at 896875bps
Motion Processor CT-Sync Slave
26
The baud rate is fixed at 896875bps
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