Instruction Manual

<Appendix D Action of External Input and Output Signals>
App.D-28
IM 11B08A01-01E
 Retransmission
Upon receiving “Data retransmission request (#R)” during data transmission, the GC8000
sends the previous data again.
*1
*2 *2
DCS #A #R #R
GC8000 #E Data 1 Data 1 Data 1
*1: 3 seconds or less, *2: 0.04 seconds
<Timing for input command>
 Input command (normal)
While not sending data to DCS, the GC8000 sends “Input command prompt (#T)” at an
interval of 8 seconds. If the GC8000 does not receive an input command from DCS for 5
seconds after sending the prompt, the GC8000 waits for 3 seconds and then sends the
prompt to DCS again. The GC8000 accepts any command only for the fi rst 5 seconds after
sending the prompt.
*3
*4
DCS Cmd 1
GC8000 #T #T #B or #W #T
*1
*2 *2
*1: 5 seconds, *2: 8 seconds, *3: 5 seconds or less, *4: 0.04 seconds
 Input command
After successfully processing an input command from DCS, the GC8000 sends
“Answerback (command executed) (#B)” to DCS. After that, the GC8000 accepts up to 6 (7
in total) input commands from DCS.
If it fails to process an input command from DCS, the GC8000 sends “Answerback
(command not executed) (#W)” to DCS. After that, the GC8000 accepts up to 6 (7 in total)
input commands from DCS.
If it receives an invalid input command from DCS, the GC8000 sends “Answerback
(command not executed) (#W)” to DCS. After that, the GC8000 accepts up to 6 (7 in total)
input commands from DCS.
*1 *1
DCS Cmd 1 Cmd 2 Cmd 3
*2
GC8000 #T #B or #W #B or #W #B or #W
*1: 0.04 seconds, *2: Accepts up to 6 commands including the unexecuted one
 GC8 type
In the GC8-compatible mode, the GC8000 sends “Input command prompt (#T)” once
after sending analysis value, calibration factor, or alarm data. The GC8000 accepts any
command only for the fi rst 5 seconds after sending the prompt.
*1 *1 *2 *3
DCS #A #A
GC8000 #E Data 1 #F #T
Does not accept any
command after this point
*1: 0.04 seconds, *2: 3 seconds (Does not accept any command) ,*3: 5 seconds
2nd Edition : May 11, 2012-00