Hardware reference guide

Ethernet Modules
306
35013379 11/2011
MODBUS I/O Scanner
The functionality of the NOE771xx module is further enhanced by the addition of a
MODBUS I/O Scanner that can be configured with either the Modsoft, Concept, or
ProWorx programming panel. This allows the user a means to transfer data between
network nodes without using the MSTR instruction.
The NOE771 MODBUS I/O Scanner can be configured by either of the following two
methods:
z Peer Cop (Available on NOE77100 only)
z Ethernet I/O Scanner
NOTE: It is recommended that the enhanced MODBUS I/O Scanner be used for all
new installations. Peer Cop functionality is provided only as an easy migration path
for an existing installation. The enhanced MODBUS I/O Scanner provides greater
functionality than the Peer Cop based I/O scanner.
Peer Cop Based I/O Scanner
The following table lists the characteristics of the Peer Cop based MODBUS I/O
Scanner, which is available only on the NOE77100.
Enhanced Modbus I/O Scanner
The following table lists the characteristics of the Enhanced based MODBUS I/O
Scanner, which is available on the NOE77100, NOE77101, and NOE77111.
Parameter Value
Max. No. of Devices 64
Max. No. of Input Words 500
Max. No. of Output Words 500
HealthTimeout Value Global Setting (20 Msec to 2 Secs in 20 mSec
increments)
Input TimeOutState Global Setting (Zero or Hold)
IP Address Derived from MODBUS Address (must be on NOE’s
Subnet)
Remote Register Reference Not configurable - 400001 is used
Parameter Value
Max. No. of Devices 128: NOE77100, NOE77101 and NOE77111.
Max. No. of Input Words 4000
Max. No. of Output Words 4000
HealthTimeout Value Individual Setting (1 Msec to 2 Secs in 1 mSec
increments)