Yokogawa PC-Based MX100 - Manual (Page 43)

1-34 IM MX100-01E
Output Operation during Abnormality (by Output Setting)
Output Setting Abnormal Status Output Operation
Trans. output Referenced input channels are +Over Outputs a value +5% of the specified
within units span of the output channel *2
Referenced input channels are –Over Outputs a value –5% of the specified
span of the output channel *2
Referenced input channel is illegal Operation upon errors
(input modules are removed)
Referenced input channel is disable *3
Referenced input channel is Invalid
(math error in difference computation)
Communication timeout No effect
Internal communication error Output value held (immediately
after internal comm error occurs,
the output value is held, but there is
a recovery operation *1 )
CPU abnormality Operation upon errors
Trans. output Referenced input channels are +Over Outputs a value +5% of the specified
between units span of the output channel
(user output) (calculated with MXSTANDARD,
MXLOGGER, or the API)
Referenced input channels are –Over Outputs a value –5% of the specified
span of the output channel
(calculated with MXSTANDARD,
MXLOGGER, or the API)
Referenced input channel is illegal Operation upon errors
(input modules are removed) (with MXSTANDARD,
Referenced input channel is disable *3 MXLOGGER, or the API)
Referenced input channel is Invalid
(math error occurs)
Communication timeout Operation upon errors
Internal communication error Output value held (immediately
after internal comm error occurs,
the output value is held, but there is a
recovery operation *1 )
CPU abnormality Operation upon errors
Manual output Communication timeout Operation upon errors
(user output) Internal communication error Output value held (after internal comm
error occurs, the output value is held,
but there is a recovery operation*1)
CPU abnormality Operation upon errors
Pattern output Communication timeout Operation upon errors
(user output) Internal communication error Output value held (immediately after
internal comm error occurs, the output
value is held, but there is a recovery
operation *1 )
CPU abnormality Operation upon errors
*1 See “Output Operation after Recovery from Abnormality” on the next page.
*2 However, only within the range that can be output.
Ex.: If the span for PWM is set to 0-100%, +Over is +100% and –Over is 0%.
*3 Invalid with the MX100 Standard Software. With the API for MX100 and DARWIN, it is “Skip.”
1.11 Operation of the 8-CH Medium-Speed Analog Output Module and the 8-CH Medium Speed PWM Output
Module