Serial Port Baud Rates; Mode Switch - Emerson PaCSystems VersaMax Series User Manual

User Manual
GFK-1503F
The following table compares the functions of Port 1 and Port 2.
CPU Protocols (SNP slave, RTU
master/slave, Serial I/O)
Firmware Upgrade
Smart module firmware
upgrade
2.4.1

Serial Port Baud Rates

RTU protocol
Serial I/O protocol
SNP protocol
Firmware
Upgrade via
WinLoader
* Only on one port at a time, not available on older CPU001 and CPU002 hardware revisions.
** Some versions of VersaPro software allow configuration of RTU and Serial I/O at 115.2K
baud for CPU005. However, this baud rate is not supported by the CPU. If a configuration using
this baud rate is stored to the PLC:
1.
2.
2.5

Mode Switch

The CPU module has a convenient switch that can be used to place the PLC in Stop or Run
mode. The same switch can also be used to block accidental writing to CPU memory and
forcing or overriding discrete data. Use of this feature is configurable.
The default configuration enables Run/Stop mode selection and disables memory
protection.
CPU Module Datasheets: CPU001, CPU002, CPU005
CPU001, CPU002
1200, 2400, 4800, 9600, 19.2K
1200, 2400, 4800, 9600, 19.2K
4800, 9600, 19.2K, 38.4K*
1200, 2400, 4800, 9600, 19.2K,
38.4K
For RTU, an "Unsupported Feature in Configuration" fault is logged and the PLC transitions
to Stop Faulted mode.
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.
Port 1 Port 2
Defaults to SNP slave Defaults to SNP slave
PLC in Stop/No I/O no
mode.
PLC in Stop/No I/O PLC in Stop/No IO
mode mode.
CPU005
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
Chapter 2
Jan 2020
**
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