- EPROM Resident
- Data Transfer Rates up to 38.4 kbps
- Support for MODBUS commands: 1, 2, 3, 4, 5, 6, 7, 8, 15, 16, 17
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- Supports Modbus RTU and ASCII Modes
- Single and Dual Port Versions
- Polls up to 247* Modbus Slave Devices per port
- Standard Ladder Logic COMMREQ's
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- GE Series 90-30 (PCM 301, 311)
- GE Series 90-70 (PCM 711)
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The Modbus protocol driver family is a series of compiled, EPROM based programs
designed for operation on the GE Fanuc 90-30 or 90-70 series Programmable Coprocessor
Modules (PCM's).
The Modbus driver family of products enable a GE Series 90 PLC to provide economical
and secure control and monitoring of intelligent Modbus field devices through a standard
serial interface.
Modbus is used extensively worldwide and has become the defacto standard communications
protocol for many industrial and utility equipment manufacturers. CPI's Modbus drivers in
conjunction with a GE Series 90 PLC provides the capability for cost-effective
supervisory control of Modbus devices through a wide assortment of PC-based graphical user
interface packages (i.e. Cimplicity, Intellution, Wonderware, etc.).
CPI's Modbus drivers currently support RS-232 point-to-point connections and RS-485/422 multidrop
connections for up to 247* Modbus 'slave' devices per port with data transfer rates up 38.4kbps.
Our Modbus drivers use standard LogicMaster COMMREQ commands to implement the Modbus
protocol as a 'Master' for the Series 90 PLCs. LogicMaster is a PC-based software package
used to configure logic and data access routines for GE Fanuc programmable logic controllers.
The driver is stored as a non-volatile, binary file on one of the PCM EPROM's. The program begins
execution during PCM module power up or after a hard or soft reset of the PCM module.
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