Toshiba TC-net Instruction Manual page 130

10. RAS function
OPC Server "Change of enable or disable of request to stop of the scan transmission of
other station".
(2) Monitor function of continuation request of the scan transmission of own station
This is a function when used TC-net100(JTNI PCI Express Card) or TC-net1G (JTGI).
OPC server enables "Monitor function of continuation request of the scan transmission"
(WDT) of JTNI/JTGI of own node, and outputs "Scan Transmission Continuation
Request" regularly if all each tasks of OPC server are normal.
When JTNI/JTGI of own node watch presence of "Scan Transmission Continuation
Request" in set monitor time. When this request disappeared, JTNI/JTGI of own node
judges OPC server to be abnormal and stops the scan transmission. If OPC Server is dual
system, child node backs up this node.
Default setting of this function is enabled.
About a way to change this function, please refer to 7.1 How to set the environment for
OPC Server "Change of enable or disable of monitor function of continuation request of
the scan transmission of own station".
An action of each parameter of action environment setting file "TCnetOPCSvr.ini" in the
following.
(Abbreviate "Monitor function of continuation request of the scan transmission" to
"WDT" as follows)
ScanContMoniEnable =1 --- 1: Enable, 0 : Disable
ScanContMoniTimeout=5 --- Monitor time (Max:16s), Unit : sec
ScanContMoniWaitTime=60 --- Fixed wait time to a start of WDT, Unit : sec
ScanContMoniFloatTime=60 --- Floarting wait time to a start of WDT, Unit : sec
ScanContMoniExecCount=3 --- Execution number of times of WDT reset processing
There are "Fixed wait time" and "Floarting wait time", from completion of initialize of
OPC Server or dual state changes till start of WDT.
After completion of initialize of OPC Server or dual state changes, wait for "Fixed wait
time". Wait for "Floarting wait time" afterwards.
If WDT reset processing was executed more than "ScanContMoniExecCount" times
among "ScanContMoniTimeout" time, judge that CPU load became low and was stable.
Start of WDT after checking the operation of WDT if became this state.
Cannot judge to CPU load became low and was stable, or judge to WDT function was
wrong, validate WDT forcibly after "ScanContMoniFloatTime" time passed.
OPC Server start
or Restart from
OPC Server Setting
Tool
Execution timing of
WDT reset processing
ScanContMoniWaitTime
122
Initialization
completion or
dual status
changed
ScanContMoniFloatTime
Start of WDT
ScanContMoniTimeout