Yokogawa Standalone MW100 - Manual (Page 75)

1-61
IM MW100-01E
Explanation of Functions
1
2
3
4
5
App
Index
Preset Output upon Error (Firmware version R3.03 or later)
The following types are available.
Output Notation Description
Off Off No forced transition to Open/Close upon error.
Open Open Relay output Open (De-energize) upon error.
Close Close Relay output Close (Energize) upon error.
• The following conditions are required when the DO preset setting is enabled.
• The DO output type must be “Alarm DO”
• The Hold setting must be “Off”
• The Action must be “OR”
• The Energize/De-energize setting is enabled as in the standard specifications.
• Even if the preset setting is enabled for Alarm DO, DO preset output does not occur if
no alarm DO assignment from measurement or MATH channels is assigned.
• The computation error definition is for when the computed value is ±OVER.
• If multiple measurement or MATH channels are set for alarm DO output, the preset
output upon error is carried out if an error occurs on any one of the channels.
• Preset output upon error is cleared when errors are cleared on all measurement or
MATH channels set as alarm DO.
Preset Output upon Stop (Firmware version R3.03 or later)
The following types are available.
Output Notation Description
Off Off Holds previous value
Open Open Relay output Open (De-energize) upon error.
Close Close Relay output Close (Energize) upon error.
The stop detection/clear condition varies depending on the combination of channels set
for alarm DO.
Alarm DO setting Stop detected Stop cleared
Measurement channels only Measurement stop Measurement start
MATH channels only Computation stop Computation start
Measurement + MATH channels Computation stop Computation start
If a stop is detected during preset output upon error, the preset output upon stop is
carried out.
1.14 Functions of the 10-CH, Medium-Speed Digital Output Module