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Appendix 4 Replacing Local Station from A/QnA Series to Q Series
Appendix 4.1 Differences between Q series and A/QnA series local stations
APPENDICES
* 1 When replacing with a Q series local station, the following alternative solution can be applied to
GOT communications.
Forward loop test
Reverse loop test
Place the Q series local station into RUN status (Y10 =
ON) to conduct the test.
Section 5.5.3 Forward loop test/reverse loop test
If the test is conducted in STOP status (Y10 = OFF), the
master station treats the Q series local station as a faulty
station (relevant bit in D9228 to D9231 is turned ON).
However, the test is normally conducted.
Place the A/QnA series local station into STOP status to
conduct the test.
Replacement for
special relay (for link)
LRDP instruction receive request
(Buffer memory address: AC
H)
LRDP instruction completion (M9204)
LWTP instruction receive request
(Buffer memory address: AE
H)
LWTP instruction completion (M9205)
Hardware failure (RUN LED: OFF) Link card failure (M9211)
Link status (X0) Link status (M9240)
Table App.4 Alternative solution for GOT communications
Before replacement Alternative solution
GOT is connected to master station to access
A/QnA series local station.
•Send/receive the link data of the devices that are used for access
from the GOT.
Change the setting so that the GOT can access the devices
refreshed on the host station.
•If the number of link points is insufficient, install another local
module to the QA1S6 B extension base unit where the Q series
local station is mounted.
GOT is connected to A/QnA series local
station to access master station.
Table App.3 Differences between Q series and A/QnA series local stations(Continued)
Item
Description
Q series local station A/QnA series local station