S1 745 Setup
745
Transformer Management Relay
Setpoints
http://www.GEindustrial.com/multilin
5–25
GE Multilin
• DEFAULT MESSAGE TIMEOUT: After this period of time of no activity on the
keys, the 745 automatically begins to display the programmed set of default
messages programmed in
S1 745 SETUP !" DEFAULT MESSAGES.
Communications a) Main Menu
PATH: SETPOINTS !" S1 745 SETUP !" COMMUNICATIONS
b) Port Setup
PATH: SETPOINTS ! S1 745 SETUP !" COMMUNICATIONS ! PORT SETUP
Up to 32 relays can be daisy-chained and connected to a computer or a
programmable controller, using either the two wire RS485 or the four wire RS422
serial communication port at the rear of the 745. Before using communications,
each relay must be programmed with a unique address and a common baud rate.
• SLAVE ADDRESS: Enter a unique address, from 1 to 254, for this particular
relay on both COM1 and COM2 serial communication links. This setpoint cannot
be changed via the communication ports. Although addresses need not be
sequential, no two relays can have the same address. Generally each relay
added to the link will use the next higher address, starting from Address 1. No
address is required to use the front panel program port since only one relay can
be connected at one time.
• COM1/COM2 BAUD RATE: Select the baud rates for COM1, the RS485/RS422
communication port, or COM2. These setpoints cannot be changed via the
communication ports. All relays on the communication link, and the computer
connecting them, must run at the same baud rate. The fastest response is
obtained at 19200 baud.
• COM1/COM2 PARITY: The data frame is fixed at 1 start, 8 data, and 1 stop
bit. If required, a parity bit is programmable. This setpoint cannot be changed
via the communication ports. The parity of the transmitted signal must match
the parity displayed in this setpoint.
• COM1 HARDWARE: If the two-wire RS485 hardware configuration is required
for the COM1 serial communication port, select RS485. This setpoint cannot be
! COMMUNICATIONS [!] ! PORT SETUP [!]
See below.
MESSAGE
! DNP [!]
See page 5–26.
! COMMUNICATIONS [!] SLAVE ADDRESS:
254
Range: 1 to 254 in steps of 1
MESSAGE
COM1 BAUD RATE:
19200 Baud
Range: 300, 1200, 2400, 4800, 9600,
19200 Baud
MESSAGE
COM1 PARITY:
None
Range: None, Even, Odd
MESSAGE
COM1 HARDWARE:
RS485
Range: RS485, RS422
MESSAGE
COM2 BAUD RATE:
19200 Baud
Range: 300, 1200, 2400, 4800, 9600,
19200 Baud
MESSAGE
COM2 PARITY:
None
Range: None, Even, Odd
MESSAGE
FRONT BAUD RATE:
19200 Baud
Range: 300, 1200, 2400, 4800, 9600,
19200 Baud
MESSAGE
FRONT PARITY:
None
Range: None, Even, Odd
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