Channel, Serial, And Protocol Setups; Srtp/Snp Protocol Mode; Serial Interface Configuration; Snp T1 - T4 Timers - GE VersaMax IC200SET001 User Manual

4
Configuration

Channel, Serial, and Protocol Setups

To change the Channel settings, press '2'. The following values can be
set/changed: Protocol Mode, Serial Interface setup, SNP T1-T4 timers.
Note: SNP T1 thru T4 timers should not be modified under normal
circumstances. A thorough knowledge of SNP is required to modify the T1 –
T4 timeouts.

SRTP/SNP Protocol Mode

The SRTP/SNP mode needs to be set based on how the VMSE will be used.
Mode#1 - The most common usage (and the default) is for the VMSE to be
connected to a SNP slave. For this usage set the SRTP/SNP mode to
MODE#1 (Enter a "1"). This is what is used for VersaPro or HMI to
communicate with a PLC by using a VMSE at the PLC.
Mode#2 – Mode#2 is used to connect a SNP master to the network using a
VMSE. An example of this is:
A Series 90 PLC with a serial port set up for SNP where COMMREQs are
used to communicate with other PLCs.

Serial Interface Configuration

Enter the interface setup as BBBB,D,P,S where BBBB is the baud rate (
default is 19200, D is the number of data bits (must be 8), P is parity (SNP
defaults to O, the letter "O" not zero, S number of stop bits ( must be 1).
The Default setting is the same as PLC defaults; 19200 Baud, 8 data bits,
Odd parity, and 1 stop bit.
SNP T1 – T4 Timers
T1 – Turn-Around Delay
T2 – ACK/NAK Timeout
T3 – Link Idle Timeout
T4 – After Break Delay
GFK-1852B Chapter 4 Configuration 4-7