Yokogawa GC8000 Process Gas Chromatograph - Manual (Page 456)

<Appendix D Action of External Input and Output Signals>
App.D-11
IM 11B08A01-01E
 Contact Output
As for contact output, by using optional D/O cards (up to four cards, fi ve outputs per card) and by
using optional DI/O cards (up to four cards, three inputs and outputs per card), up to 20 outputs
and up to 12 outputs can be output, respectively.
Specify the settings on the D/O setting screen on the GC-HMI EtherLCD, and then verify the
operation condition on the D/O condition screen on the GC-HMI EtherLCD.
The following seven types can be specifi ed for contact output.
• Stream Sequence
• Stream
• Operation
Mode
• Alarm
• Timing
• Calibration/Validation
• Stream Valve Switching
 Stream Sequence
The Stream Sequence function of D/O is a function to send out information that a preset stream
sequence number is assigned to each GCM. When a stream number specifi ed for a GCM on
the D/O setting screen is activated, the contact output is turned on regardless of the mode (stop,
pause, or run).
Multiple stream sequence numbers can be set for one contact.
Action in the case where the stream sequence number 1 of the GCM number 1 is set for the
contact number 1 are described below. For example, Table 10 describes the action of D/O1
under the condition of stream sequence and calibration setting shown in Table 9.
Table 9 Example of Stream Sequence Settings and Calibration Setting
1st stream 2nd stream 3rd stream
Stream sequence 1 Stream 1 Stream 2 Stream 3
Stream sequence 2 Stream 4 Stream 5 Stream 6
Calibration
stream
number
Measurement
frequency
Automatic
calibration
Validation
stream
number
after
calibration
Measurement
frequency
Validation
stream
number
before
calibration
Measurement
frequency
Calibration 1 Stream 7 2 Valid 0 0 Stream 8 1
2nd Edition : May 11, 2012-00
App.D