Yokogawa Standalone MW100 - Manual (Page 72)

1-58
IM MW100-01E
Output Operation during an Abnormality (by Output Setting)
Output Setting Abnormal Status Output Operation
Transmission Referenced input channels are +Over Outputs a value +5% of the specified
output within units
span of the output channel *1
Referenced input channels are –Over Outputs a value –5% of the specified
span of the output channel *1
Referenced input channel is illegal Operation upon errors
(input module removed)
Referenced input channel is set to Skip
Referenced input channel is Invalid
(math error in Differential computation)
Internal communication error Output value held (occurs immediately
after an internal communication error,
but there is a recovery action *2 )
CPU abnormality Operation upon errors
Arbitrary output Internal communication error Output value held (occurs upon an
internal communication error, but there
is a recovery action *2 )
CPU abnormality Operation upon errors
*1 PWM output may not always reach +5% (+Over)/–5%(–Over).
*2 See “Output Operation after Recovery from an Abnormality.”
Output Operation after Recovery from an Abnormality (by Output Setting)
Output Setting Abnormality Recovery Output Operation
Transmission Referenced input module recovers Operation upon errors → transmission
output within units (removed input modules are inserted) output
Referenced input channel changed
from Skip to Measurement range
Referenced input channel is restored
from Invalid (math error in Differential
computation) to normal
Recover after internal communication If the error recovery time is 10 s or
error more; operation upon error →
operation upon power ON→
Transmission output
If the error recovery time is within 10 s;
operation upon startup → transmission
output
CPU abnormality (does not recover) Operation upon errors
Arbitrary output Recover after internal communication If the error recovery time is 10 s or
error more; operation upon error →
operation upon power ON→ arbitrary
output*
If the error recovery time is within 10
s; operation upon startup → arbitrary
output*
CPU abnormality (does not recover) Operation upon errors
* Executed by arbitrary output from the PC after recovering from the error.
1.13 Operation of the 8-CH Medium-Speed Analog Output Module and the 8-CH Medium Speed PWM Output
Module