Offline Tests From Gx Developer; Station-To-Station Test - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION

4.7 Offline Tests from GX Developer

4.7.1 Station-to-station test

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The offline tests check the cable connection status using the network parameters of
GX Developer.
In the station-to-station test, the hardware of the network modules and cables between
two adjacent stations can be checked.
The following explains how to conduct the station-to-station test:
(1) System configurations
(a) [Optical loop system]
Connect IN and OUT of two network modules with an optical fiber cable.
Station to
execute test
Station
No. n
IN
Side
OUT
(b) [Coaxial bus system]
Connect two network modules with a coaxial cable.
Station to
execute test
Station
No. n
Side
Terminating
resistor
(c) [Twisted bus system]
Connect the network module with a shielded twisted pair cable or CC-Link
Ver. 1.10-compatible cable.
Station to
execute test
front
Twisted pair cable or
CC-Link Ver. 1.10-
compatible cable
Station to
be tested
Station
No. n+1
IN
Side
OUT
Optical fiber cable
Station to
be tested
Station
No. n+1
Side
Coaxial cable
Terminating
resistor
Station to
be tested
front
Terminating
Terminating
resistor
resistor
MELSEC-Q
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