Applies To:
  • CitectSCADA VijeoCitect v6.x
Summary:
Intermittent #COM on network only to the Schneider-Electric Powerlogic CM4000 and Power Meter PM Series I/ODevices. 

Solution:
 The following settings were needed and applied to resolve the Intermittent #COM issue specific to this Users Network.  Time settings may need to be increased or decreased dependent upon the network in question.

Latest Released Modnet Driver & TCPIP Driver required to be installed as listed in the Citect Driver Web.

[IOServer]

AlwaysCallStopUnit=1

AlwaysCallStopChannel=1

WatchdogPrimary=1  (Only on the Primary I/O Servers is this parameter set)

Watchdog=0  (Only on the Standby I/O Servers is this parameter set)

BlockWrites=0
[Modnet]

Maxbits=1920  !(Set to match ProtDir.dbf for MODNET / Suggested size for these SE devices = 2048)

Timeout=6000  !(Dependent upon network)

Retry=1     !(Default for some Modnet drivers is 0) 
 Block=240 !(Default is 250, so may be still be applicable to use defaults)
MaxOutstanding=1
MaxPending=2
[Page]
ScanTime=1000  (Default =250ms so this parameter is dependent upon network and allowed stale values)

Citect.BIN\ProtDir.DBF BitBLOCK & MaxBits both set to equal Citect.ini parameter of 1920

I/O Device forms for all CM4000 have Cache=TRUE and Cache Time=1000
I/O Device forms for all PM Series have Cache=TRUE and Cache Time=2000

 

Keywords: CM4000 PM280 PM800 SE Power Meters Slow Network

                                                             Authors: Gil Blackburn / Jack King / Nathan Slider
 

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