Hardware reference guide

Network Configurations
52
35013379 02 October 2007
Modbus
Plus
Services
MSTR read/write register messagin
-Y-Y-Y
MSTR read/write Global Data
messaging
-Y-Y-Y
MSTR get/clear local/remote statistics - Y - Y - Y
Config Extension Global Data Support - Y - Y - N
Config Extension Peer Cop Support - Y - Y - N
Distributed I/O Support - Y - Y - N
CPU Programming - - -
Executive Firmware Loading Support - Y - N - N
Type Service Description Native CPU Ports NOM 1-2 Ports NOM 3-6 Ports
Modbus Modbus
Plus
Modbus Modbus
Plus
Modbus Modbu
s Plus
g
6
Y
4
Y
4
Y
4
Note:
1. Only supported on the 140CPU42402, 140CPU42412(A) and
140CPU53414(A)/(B) Quantum Controllers.
2. The native CPU Modbus port can be disabled from bridge mode operation with
the native Modbus Plus Port.
3. Modbus ports on NOMs are always in bridge mode with their associated
Modbus Plus port.
4. Only one programmer connection can be logged in at a time to any CPU, and
only one program monitor can be attached at a time to any CPU.
5. Modbus port parameters on NOMs 3-6 are defined by Modbus Port 3 in Concept
and Modsoft when the comm parameter selector switch is in mem.
6. Up to 4 MSTR read/write register instructions can be serviced per CPU scan per
Modbus Plus port.
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com