Communication With External Devices; Correspondence Between The Interface And Channel Number - Mitsubishi QD51 Programming Manual

7 COMMUNICATION WITH EXTERNAL DEVICES

7 COMMUNICATION WITH EXTERNAL DEVICES
The communication module is equipped with several communication interfaces and the
communication with external devices and terminals can thus be achieved through
various interfaces.

7.1 Correspondence between the Interface and Channel Number

A unique number, called "channel number," is assigned to each interface.
In order to communicate with an external device or terminal, specify which of the
communication module interfaces is to be used using the channel number in question.
Channel number
Channel number
1 QD51-R24 does not have CH2 (RS-232C).
2 A1SD51S does not have CH4 (PARALLEL).
7 - 1
External device
(Printer)
2
1
CH2(RS-232C)
4
2
CH4(PARALEL)
REMARK
The communication module uses the non-procedure protocol for all communication
with external devices and terminals.
To perform protocol communication, the user needs to write a protocol control
program.
A
D51H
Terminal
A
D51H
MELSEC-Q
Channel number
1
CH1(RS-232C)
7
Channel number
3
CH3(RS-422/485)
7 - 1