User guide

<3. Functions>
3-4
IM 11B06E01-01E
Holding register (40001 to 49999)
Data Address Description
Time setting
value
40001
40002
40003
40004
Setting the clock time.
For data format, refer to “5.3 Holding Register (set data)” in “GS 11B08B02-
01E GC8000 Modbus Communication” or “GS 11B03G02-02E GC1000
MarkII Modbus Communication”.
ThedataarekeptafterwritingontheanalyzerandPCAS.
Mapping area 41001 to
49000
Setting the input register or holding register address of analyzers.
ASGW only reads the input register on the analyzer.
ASGW only writes the holding register on the analyzer.
The holding registers are as follows.
GC8000:
Refer to “5.3 Holding registers (setting data)” in “GS 11B08B02-01E
GC8000 Modbus Communication”. However, “40001-40004: Time Setting
Request”isnotavailable.
GC1000 MarkII:
Refer to “5.3 Holding Register (set data)” in “GS 11B03G02-02E GC1000
MarkII Modbus Communication”. However, neither “40001-40004: Time
SettingRequest”nor“41DDD:Analysisvalue”isavailable.
Theotheraddressareaisignored.TheholdingregisterinPCASandASIU
can not be set.
Input register (30001 to 39999)
Data Address Description
Mapping area 31001 to 39000 Setting the input register address of analyzers.
ASGW reads the addressed data from analyzers.
l Access to the address not listed or mapped
Access to the address that is not shown on the table or not mapped does not generate an error.
However, the value of data is uncertain.
DCScannotwritetothecoilorholdingregisterofASGWthatisnotdenedinthetableabove.
However,withsetting“#ADDR_CHK,OFF”after-mentioned,DCScanwritetothecoilorholding
register of ASGW.
l Retry to writing
WhenanerroroccursinwritingtothecoilorholdingregisterofanalyzersandPCAS,ASGWtries
towritethespeciednumberoftimes.Thenumberofretrytimescanbespeciedonthesetting
le.
l Character time-out
Value of character time-out for communication between DCS and Modbus RTU can be set ac-
cording to communication speed. The value of mean time of each characters is set on the setting
le.
l Holding time of Data renewal bits
ThevariabledatabitssuchasDatarenewal,RenewalofCalibrationCoefcientandAlarmStatus
ChangeandbeheldforaconstanttimeforDCSreading.Holdingtimecanbespecied.Theunit
is second.
l TCP time-out
Valueoftime-outforModbusTCPcommunication.Theunitissecond.1secondormoreisrec-
ommended.
4th Edition : Nov. 22, 2011-00