Yokogawa GC1000 Mark II Process Gas Chromatograph - Manual (Page 72)

<Toc> <Ind> <5. Actions of External Input and Output Signals >
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IM 11B03A03-01E
(2) Input Relay (Status Contact)
(1) Analyzer normal
The GC1000 Mark II is normal. A 1 is displayed if there is no active level 1 (critical
failure) or level 2 (minor failure) alarm.
(2) Analyzer error
The GC1000 Mark II is faulty. A 1 is displayed if there is at least one active level 1
(critical failure) alarm.
(3) Alarm status change
A 1 is displayed when a new alarm occurs on the GC1000 Mark II. After this status is
read and when at least one alarm status is read, this bit is automatically reset to 0.
(4) Measuring (Run mode)
The GC1000 Mark II is analyzing. A 1 is displayed when it is in Run mode. Otherwise,
0 is displayed.
(5) Stop (Stop mode)
The GC1000 Mark II is not analyzing. A 1 is displayed when it is in Stop mode. Other-
wise, 0 is displayed.
(6) Maintenance (other modes)
If the GC1000 Mark II is in Manual, Lab, or Pause mode, a 1 is displayed. Otherwise,
0 is displayed.
(7) Data update
New analysis data is now available from the GC1000 Mark II. Data update is auto-
matically reset to 0 once data update is read and at least one analysis value is read.
(8) Data valid
Data is valid for a particular peak on the GC1000 Mark II. For analysis peaks, the
analysis value must be between the upper and lower limits and the retention time is at
or below the upper limit. For operation peaks, the data to be used for operation is
valid. A 1 is displayed when data is valid.
(9) Alarm status
The alarm status of the GC1000 Mark II is displayed for each alarm number. If an
alarm occurs, 1 is displayed. Otherwise, 0 is displayed. The alarm number is 1 to 99
for level 1 alarms of the GC1000 Mark II, and 101 to 199 for level 2 alarms of the
GC1000 Mark II.
(10) Calibration factor update
The GC1000 Mark II has new calibration factors for a particular stream. The address
is reset to 0 after the calibration factor update is read and when at least one calibration
factor is read.
(11) Executing the Stream Sequence
The corresponding stream sequence on the GC1000 Mark II is being executed.
(12) Measurement status command failure
If the command is not executed after any of the Stream (continuous) setting com-
mand, Calibration/Validation command, Stream Sequence setting command has been
sent by the coil, 1 is displayed. When the command is executed after the next com-
mand has been sent, this bit is reset.
3rd Edition : Aug. 23. 2006-00