Mitsubishi Electric R60AD8-G User Manual page 285

■"Duplicated input mismatch automatic recovery setting"
The default value of this setting is "Disable". With this setting set to "Enable", it is determined that the error cause has been
cleared for a channel for which the double input discrepancy detection verification results have been continuously within the
allowable error range for the number of times specified in "Duplicated input mismatch automatic return count" after a double
input discrepancy detection error (error code: 1EDH) occurred, and the double input discrepancy detection error (error
code: 1EDH) will be cleared automatically.
[Navigation window]  [Parameter]  [Module Information]  [R60AD8-G(S2M)]  [Module Parameter]  [Application
setting]  [Duplicated input mismatch automatic recovery setting]
With "Duplicated input mismatch automatic recovery setting" set to "Enable", a channel, where a double input
discrepancy detection error (error code: 1EDH) has occurred and thus stops, may start operation
immediately after the error state is eliminated. When "Duplicated input mismatch automatic recovery setting"
is set to "Enable", the safety requirements of the system is not satisfied.
With "Duplicated input mismatch automatic recovery setting" set to "Enable", whether a double input
discrepancy detection error (error code: 1EDH) has occurred cannot be checked via program after auto
recovery. Check whether a double input discrepancy detection error (error code: 1EDH) has occurred from
the Module Diagnostics window. To check whether a double input discrepancy detection error (error code:
1EDH) has occurred via program, set "Duplicated input mismatch automatic recovery setting" to "Disable".
■"Duplicated input mismatch automatic return count"
With "Duplicated input mismatch automatic recovery setting" set to "Enable", set for each channel how many times the double
input discrepancy detection verification results must be within the error range before the double input discrepancy detection
error (error code: 1EDH) is automatically cleared.
[Navigation window]  [Parameter]  [Module Information]  [R60AD8-G (S2M)]  [Module Parameter]  [Application
setting]  [Duplicated input mismatch automatic return count]
• With "Duplicated input mismatch automatic return count" set to 0, the setting value of "Duplicated input
mismatch detection count" is used instead as "Duplicated input mismatch automatic return count".
• Parameter settings of "Duplex input error range setting", "Duplicated input mismatch detection count", and
"Duplicated input mismatch automatic return count" need to be set to allow the customer's system error
range. If these settings do not allow the customer's system error range, a double input discrepancy
detection error (error code: 1EDH) may occur consecutively.
Ex.
The following figure shows auto recovery timing under the following conditions.
• "Duplicated input mismatch detection count": 3
• "Duplicated input mismatch automatic return count": 4
SIL2 A/D conversion
cycle
Out of the
Within the
Double input
allowable
allowable error
discrepancy detection error range,
range (1)
1st time (2)
Digital operation
OFF value
value
Double input
discrepancy detection
error
(A) A double input discrepancy detection error (error code: 1EDH) occurs.
(B) When the verification results are within the error range for four times, a double input discrepancy detection error (error code: 1EDH) is cleared.
Out of the Out of the
Out of the
allowable allowable
allowable error
error range, error range,
range (5)
2nd time (3) 3rd time (4)
Value of (2) OFF value
(A)
No error
Within the Within the Within the
allowable allowable allowable
error range, error range, error range,
1st time (6) 2nd time (7) 3rd time (8)
OFF value
Occurred
10.8 SIL2 A/D Conversion Function
Within the
allowable
error range,
4th time (9)
Value
of (9)
(B)
No error
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