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Main Menu
Communications
Serial Port S1/S2
26
900 Control Station User Guide
Revision 9
May 2014
Table 9 Protocol selection versus setup parameters for the Serial Port S1/S2
Setup parameter
Protocol selection
ELN
Modbus
Master or
Modbus
Master
Advanced
Modbus
Slave
Multidrop
Modbus Slave
Point to Point
(PTP)
Modbus Slave
Modem
Baud Rate (BPS)
X
X
X
X
X
Modbus Parity
X
X
X
NONE
Modbus Stop Bits
X
X
X
1 BIT
Slave Address
X
X
X
Slave Port Enable
X
X
X
Double Register Format
X
X
X
Note:
When “Modbus Slave Modem” protocol is selected, the Modbus Parity and Modbus Stop Bits are fixed at
“None” and “1 Bit” respectively and cannot be changed.
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