GE VersaMax PLC User Manual

5.3.4 Configuring Serial Port Parameters
Both ports on a VersaMax PLC CPU are configurable for SNP slave or RTU slave
operation. 4-wire and 2-wire RTU are supported. For CPUE05 only, port 1 can also be
configured (on another tab) for Local Station Manager operation. The Local Station
Manager parameters may differ from the Port A parameters.
Feature Description
Default Choices
Port Mode Defines the protocol. SNP SNP, Serial I/O, RTU, Disabled.
CPUE05 can also be configured as
a Local Station Manager.
Parity Determines whether parity is
added to words
Odd. For CPUE05, when
Port Mode is Local Station
Manager, default is None.
Odd, Even, None
Data Rate (bps) Data transmission rate (in bits
per second).
Serial comms modes:
19200
SNP: 4800, 9600, 19200, 38400
RTU: 1200, 2400, 4800, 9600,
19200, 38400, 57600
Serial I/O: 4800, 9600, 19200,
38400, 57600
CPUE05 in Local Station
Manager mode: 9600
Local Station Manager mode: 1200,
2400, 4800, 9600, 19200, 38400,
57600, 115200
Flow Control Specifies the method of flow
control to use.
None RTU mode: None, Hardware
(not required if Port
Mode is SNP)
When changing Flow Control
from None to Hardware,
Turnaround Delay is reset to 0.
Serial I/O mode: None, Hardware,
Software
CPUE05 in Local Station Manager
mode: None, Hardware
Timeout Specifies the set of timeout
values to be used by Protocol.
Long Long, Medium, Short, None
(If Port Mode is SNP)
Stop Bits Number of stop bits used in
transmission. (Most serial
devices use one stop bit; slower
devices use two.)
1 1, 2
(If Port Mode is SNP or
Serial I/O)
SNP ID 8-byte ID for Port 1. None Editable
Receive to transmit
delay
Delay between receiving last
character of a message to
asserting RTS
0 SNP: Not available
RTU and Serial I/O: 0-255 (units of
10ms, e.g. 10=100ms)
Turnaround delay Delay between asserting RTS
and transmitting a message
SNP: none SNP: Long, Medium, Short, none
RTU & Serial I/O: 0 RTU & Serial I/O: 0-255 (units of
10ms, e.g. 10=100ms)
RTS drop delay Delay between when the last
character of a message is
transmitted and when RTS is
dropped.
0 SNP: Not Available
RTU and Serial I/O: 0-255 (units of
10ms, e.g. 10=100ms)
76 GFK-1503E VersaMax PLC User Manual
For public disclosure

GE VersaMax PLC Specifications

General

Brand	GE
Model	VersaMax PLC
Category	Controller
Language	English