172
10 FUNCTIONS
10.4 Input Diagnostic Function
■
Setting procedure
Perform this setting with "Redundant input discrepancy detection settings" and "Redundant input discrepancy detection type".
[Navigation window]
[Parameter]
[Module Information]
Model
[Module Parameter]
"Application setting"
"Redundant input discrepancy detection settings" and "Redundant input discrepancy detection type"
• When it is not desirable that a double input discrepancy be detected during system maintenance such as
system startup and inspection, set "Disabled" for "Redundant input discrepancy detection settings".
• When "Disabled" is selected for "Redundant input discrepancy detection settings", settings for "Redundant
input discrepancy detection type" will be ignored.
Double input discrepancy detection time
When the double input discrepancy detection time is set, even if a double input discrepancy occurs, an error will not occur
within the set detection time. The following table shows the relationships between double input evaluations and double input
discrepancy detection times.
■
Setting procedure
Set the time with "Redundant input discrepancy detection time".
[Navigation window]
[Parameter]
[Module Information]
Model
[Module Parameter]
[Application setting]
"Redundant input discrepancy detection time"
• A double input discrepancy error is detected for signals after noise removal filtering based on the input
response time. For that reason, the time from when a discrepancy occurs between actual signals until a
double input discrepancy detection error occurs is equal to the input response time + double input
discrepancy detection time.
• The "Redundant input discrepancy detection time" setting is effective only for input signals with "Redundant
input discrepancy detection settings" set to "Enabled" and "Redundant input discrepancy detection type" set
to "Discrepancy detection time specified". For input signals with values other than the above set, the value
set for "Redundant input discrepancy detection time" will be ignored.
Input terminal status
Elapsed time after discrepancy
state start
Safety input
(SA\X
)
Double input evaluation result
X
in the
RX40NC6B (Main)
X
in the
RX40NC6B (Sub)
OFF
OFF
OFF
OFF (Normal)
OFF
ON
< Double input discrepancy detection time
OFF
OFF (Mismatch)
OFF
ON
Double input discrepancy detection time
OFF
Double input discrepancy detection error
ON
OFF
< Double input discrepancy detection time
OFF
OFF (Mismatch)
ON
OFF
Double input discrepancy detection time
OFF
Double input discrepancy detection error
ON
ON
ON
ON (Normal)
Summary of Contents for MELSEC iQ-RX40NC6B
Page 1: ...MELSEC iQ R I O Module With Diagnostic Functions User s Manual Application RX40NC6B RY40PT5B ...
Page 2: ......
Page 125: ...4 OVERVIEW 123 4 MEMO ...
Page 191: ...12 MAINTENANCE AND INSPECTION 189 12 MEMO ...
Page 227: ......
