Dual Channel Mode Setting - Omron NE1A-SCPU01 - 07-2009 Operation Manual

Safety Inputs
IMPORTANT Both input ON delays and OFF delays must be added to the I/O response per-
7-2-5

Dual Channel Mode Setting

Reflecting Input Status in Input I/O Tags
Single Channel
Dual Channel
Equivalent
Dual Channel
Complementary
Input Discrepancy Time Evaluation
formance. This will affect the safety distance calculation.
For further details, refer to SECTION 11 Remote I/O Communications Perfor-
mance and Local I/O Response Time.
An NE1A-series Controller's local safety input terminals can be set to Dual
Channel Mode. Setting Dual Channel Mode enables the following.
• The status of the two inputs can be evaluated and reflected in I/O tags.
• The discrepancy time between changes in the status of the two inputs can
be evaluated.
Channel mode
Single Channel
Dual Channel Equivalent
Dual Channel Complemen-
tary
The status input to the safety input terminals is reflected in the I/O tags
according to the channel mode as shown in the following tables.
Channel mode Input to safety
input terminal
0
1
X = 0 to 15 (NE1A-SCPU01(-V1)(-EIP))
X = 0 to 39 (NE1A-SCPU02(-EIP))
Channel Mode Input to safety
input terminal
IN (n)
0
0
1
1
0
0
1
1
n = Even number
For two inputs set in Dual Channel Mode, the time is monitored from a change
in the value of one input to a change in the value of the other input (discrep-
ancy time). When the value of the other input does not change within the set
discrepancy, it is regarded as an error. The set discrepancy time can be set in
increments of 10 ms between 0 (invalid) and 65,530 ms.
The discrepancy time cannot be set in Single Channel Mode.
Used as an independent safety input terminal.
Used as a Dual Channel Equivalent Input with the paired safety
input.
Used as a Dual Channel Complementary Input with the paired
safety input.
Input Tag
IN (x) IN (x)
0
1
Input Tag
IN (n+1) IN (n)
(n+1)
0 0 0
1 0 0
0 0 0
1 1 1
0 0 1
1 0 1
0 1 0
1 0 1
Section 7-2
Description
Meaning of status
Inactive (OFF)
Active (ON)
Meaning of status
IN
Inactive (OFF)
Discrepant
Discrepant
Active (ON)
Discrepant
Inactive (OFF)
Active (ON)
Discrepant
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