Specifications Of A.b Communication Driver - LG GLOFA-GM Series User Manual

Chapter 7 Communication function
H) Other company's communication mode can perform communication via %M direct variable area of GLOFA-
PLC. Since address MAPPING used in service depends on type of communication driver, please refer to
protocol communication spec. for that.

7.4.3 Specifications of A.B communication driver

It is communication specifications for communication via AB Asynchronous Link Full Duplex protocol through GLOFA
PLC of Cnet Ver. 2.0 set to other company's dedicated mode for the service.
Operation of AB Asynchronous Link protocol is available only in Cnet I/F module Ver.2.0 or later.
Cnet I/F module operates as a server only, so client operation is unavailable.
Cnet I/F module supports AB Asynchronous Link Full Duplex protocol.
Cnet I/F module uses AB PLC-5 commands set.
AB34.lib/AB6.lib files shall be downloaded to Cnet I/F module for AB protocol operation.
Operation mode of Cnet I/F module is to be set to other company's dedicated mode in On-line mode.
Basic parameters such as communication speed, station No., etc shall be set as agreed with the
communication specification of MMI devices via Frame Editor.
Separate operation for each RS-232C/RS422 channel is available.
1) Basic specification
AB Asynchronous Link Full Duplex(DF1) protocol supported(Server only supported)
Character protocol : Start/Stop/Data/Parity setting available(using Frame Editor)
Communication speed : 300 ~ 38400 BPS available
Channel operation : Stand-alone/Interlocking operation available for RS-232C/RS-422 channels
Communication mode : HEX communication
Frame check: BCC 1 byte(complement of double the sum data except for message start/end symbols)
Station No.area : 0 ~ 31 station available
Command supported : AB PLC-5 commands set compliant
Max. data length : 110 bytes
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