Comms Installation

P778 Modem Available

Sets the MultiRanger to use an external modem.

Primary Index

Communications Port

 

0

*

No modem connected

Values

1

 

Answer only

P779 Modem Inactivity Timeout

Sets the time that the unit will keep the modem connected with no activity.

Primary Index

Communications Port

Values

Range: 0-9999 seconds

 

0

*

No timeout

To use this parameter, ensure that P778 (Modem Available) =1. Ensure that the value is low enough to avoid unnecessary delays when an unexpected disconnect occurs but long enough to avoid timeout while you are still legitimately connected. This parameter value is ignored by the Modbus Master Drivers as they automatically disconnect when done communicating.

Hanging Up

If the line is idle and the P779 Modem Inactivity Timeout expires, then the modem is directed to hang up the line. Ensure that P779 is set longer than the standard polling time of the connected master device. Set P779 to 0 to disable the inactivity timer.

P782 Parameter Index Location

Determines where index information is stored for the parameter access area for the Modbus register map.

Primary Index

Global

 

 

Values

0

*

Global

 

1

 

Parameter-Specific

For more on Parameter Index Location, see Parameter Access on page 102.

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MultiRanger 100/200 – INSTRUCTION MANUAL

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Siemens 200 P778 Modem Available, P779 Modem Inactivity Timeout, P782 Parameter Index Location, Hanging Up