Cable Lengths; Serial Port Baud Rates - GE VersaMax PLC User Manual

44 GFK-1503E
For public disclosure

3.4.1 Cable Lengths

Maximum cable lengths from the CPU to the last device attached to the cable are:
Port 1 (RS-232):
Baud Rate
19.2 K and below
38.4K
57.6K
115.2K
Port 2 (RS-485): 1200 meters (4000 ft.)

3.4.2 Serial Port Baud Rates

RTU protocol
Serial I/O protocol
SNP protocol
Local Station Manager (this is
independent of serial protocol
baud rate)
Firmware Upgrade via
WinLoader
† Only on one port at a time.
Some versions of VersaPro software allow configuration of RTU and Serial I/O at 115.2K
baud. However, this baud rate is not supported by the CPU. If a configuration using this
baud rate is stored to the PLC:
1.
For RTU, an Unsupported Feature in Configuration fault is logged and the PLC
transitions to Stop Faulted mode.
2. For Serial I/O, the same fault is logged when the transition to Run mode occurs. The
PLC will immediately transition to Stop Faulted mode.
Maximum Cable Length
15 meters (50 ft.)
7.5 meters (25 ft.)
5 meters (16 ft.)
2.5 meters (8 ft.)
Port 1
1200, 2400, 4800, 9600,
19.2K, 38.4K † , 57.6K †
1200, 2400, 4800, 9600,
19.2K, 38.4K † , 57.6K †
4800, 9600, 19.2K,
38.4K †
1200, 2400, 4800, 9600,
19.2K, 38.4K, 57.6K,
115.2K
2400, 4800, 9600, 19.2K,
38.4K, 57.6K, 115.2K
VersaMax PLC User Manual
Port 2
1200, 2400, 4800, 9600,
19.2K, 38.4K † , 57.6K †
1200, 2400, 4800, 9600,
19.2K, 38.4K † , 57.6K †
4800, 9600, 19.2K,
38.4K †
NA
NA