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5-2
Chapter
5
PARALLEL I/O INTERF
ACE
1.1 ID
setting
Use the DIP switch on the DIO option board to set the board ID (1 to 4). This ID
determines the correspondence between the I/O connector pins and the controller I/O
signals.
c
CAUTION
When using two or more DIO option boards, set different IDs so that they do
not overlap.
■
DIP switch
■
DIP switch setting and ID
Switch 1
Switch 2
ID
General-purpose input/output
Dedicated input/output
ON
ON
1
DI20-DI37/DO20-DO27
Available
*1
OFF
ON
2
DI40-DI67/DO30-DO47
None
ON
OFF
3
DI70-DI117/DO50-DO67
None
OFF
OFF
4
DI120-DI147/DO70-DO107
None
*1: To enable the dedicated inputs, CHK1 (pin No. 4) and CHK2 (pin No. 40) of the I/O
connector must be shorted. For details, refer to "1.2 Connector I/O signals" in
Chapter 5.
1. Standard I/O interface overview
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