Yokogawa PC-Based MX100 - Manual (Page 72)

2-58 IM MX180-01E
Explanaton
Alarm Reference Channel Range
The alarm detection of multiple measurement channels or computation channels can
be assigned to a single DO channel. If an alarm is detected on any one of the assigned
channels, an alarm is output. A range of individual or consecutive channel numbers can
be assigned.
Note
If connection with the PC is dropped, the state at the point at which the DO output was dropped
is retained. However, DO output to which measurement channel alarm detection is assigned
functions normally even if the connection with the PC is dropped.
Dgtal Output Operaton Other Than Alarm Output
The digital output can be enabled for the following causes.
• Manual DO
DO channels assigned to the button number output relay contact signals collectively
when the manual DO button on the Monitor screen is clicked.
Manual DO button
Click to switch ON/OFF
• FAIL output
Outputs a relay contact signal when an error occurs in the main module CPU.
Relay output is turned ON (the relay is energized) when the CPU is operating
normally. It is turned OFF when there is an error in the CPU and during power failures.
• Error output
Outputs a relay contact signal when any of the following events occur.
• A data output request timeout (60 s) occurs while recording data. (except when the
/DS option functions are enabled)
• A module error occurs.
• An input module detected at power-on that is able to make measurements is
removed.
• A module breaks down.
• An unidentifiable module is attached.
When using the energize setting for contact output, the circuit switches from open
to short when the output is enabled. When using the de-energize setting, the circuit
switches from short to open.
2.10 Dgtal Output Settngs