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Configuration
Configuration of the communication interruption
Configure the Modbus time out
A communication detected fault (Err5 and Err8) is triggered if the Altivar 212 does not receive any valid Modbus requests at its address within a predefined time period (time out) set in the [Com. time out] (F803) parameter. The timer starts when the communication has been established for the first time (valid frame, drive address matches). Any Modbus request function is taken into account to reactivated the timer (read, write and identification).
Access to the parameter
This parameter is accessible in the [COMMUNICATION MENU] COM submenu of [PROGRAMMING MENU] Programming mode.
Description
Parameter | Modbus | Setting | Unit | Default | Valid |
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[Com. time out] (F803) | 2051 | 0: Communication detection disabled | s | 3 | Setting |
Communication time out | 16#803 | 1 ... 100: 1 to 100 seconds |
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WARNING
LOSS OF CONTROL
• | If F803 is set to 0, communication control will be inhibited. |
• | For safety reasons, inhibiting the communication interruption detection should be restricted to the debug |
| phase or to special applications. |
Failure to follow these instructions can result in death, serious injury, or equipment damage.
Monitoring the Modbus communication status
Modbus communication status are displayed in Monitoring mode. This parameter enables to check the modbus communication on RJ45 and OpenStyle port.
On the embedded display terminal
Display | Display on graphic | Description | ||
example | display option |
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Mb | [Mdb com stat] | ON: | ||
| Modbus | OFF: | ||
| communication status |
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OpenStyle Tx
RJ45 Rx OpenStyle Rx
RJ45 Tx
On the graphic display terminal
When Rx and/or Tx are displayed in this row their state is inactive
RJ45: Mb activity on RJ45 port
Without Communication
Mdb com statMb activity
on OpenStyle port
RJ45 B - A - COM
Rx | Tx | Rx | Tx |
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| Switch between local to remote |
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| mode using the F4 button on the |
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| display terminal |
Rem |
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Example: With Communication on RJ45 port
Mdb com stat
RJ45 B - A - COM
Tx Rx Tx
Rx
Mdb com stat
RJ45 B - A - COM
Rx | Rx | Tx |
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RemLoc/Rem
RemLoc/Rem
28 | S1A53844 01/2011 |