GE GFK-1852 - Manual (Page 29)

GFK-1852 Chapter 4 Configuration 4-7
Configuration
4
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
communication 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 GE Fanuc 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
SNP ID to IP Address Mapping ( only for SRTP/SNP Mode#2)
This setting is used only when VMSE configuration Mode#2 is used. This setting
directs messages to the VMSE which has the IP address that corresponds to the SNP
address in this mapping table. Up to four SNP IDs to IP addresses can be entered.
Wildcards are to be used to allow multiple SNP IDs for communicate to PLCs
multidropped off of one VMSE. An example would be to enter:
SNP ID “A* ” IP Address 3.0.0.1
The SNP IDs “A1”, “AA”, and APPLE would all go the VMSE with the IP address
3.0.0.1 The PLCs with the correct SNP ID would respond to the SNP message