Technical data

PLC Library SINAUT MICRO SC

SINAUT MD720-3

C79000-G8900-C210

8.5 Program module WDC_CONTROL

The WDC-This module indicates the current operation mode of the GPRS modem

and the library.

This module enables the modem switching in the AT command mode, to become

access directly to the modem via AT commands from the user program (call via

positive flank ACT_AT_MODE).

This module enables the change to the „normal operation“ after a remote

programming session via CSD call to the GPRS modem (call via rising edge at

ACT_GPRS_SERVICE).

With separation of the CSD connection, the GPRS modem changes automatically

back into the GPRS mode. The controler is not able to recognise the end of the

phone connection. To return in any way to the GPRS communication, a time

delayed switch has to be activated in the freeport mode before connection end via

module WDC_CONTROL from the variable table of MicroWin. Therefore in

DELAY_TIME_GRPS the delay time must be specified and the switch to

ACT_GPRS_SERVICE must be activated.

For security a maximum time interval for the „not GPRS operation“ (this means

INT_MODE <> 1) can be specified (MAX_TIME_AT). After this time the modem is

switched back in any case to the GPRS operation mode, if the PLC is set to RUN.

Remark

This module is to be called from the user program once per cycle.

WDC_CONTROL

ACT_GPRS_SERVICE INT_MODE

ACT_AT_MODE BUSY

DELAY_TIME_GPRS DONE

MAX_TIME_AT ABORTED

ERROR