Channels (For Special Function); Comparator; Software Release; Module Number - Siemens SIMATIC S5 Manual

1.1.6 20.48-V-Channels (for Special Function)
If jumper D (see jumper settings in C79000-B8576-C659) is inserted, 0 to 20.48 V can be connected
to channels 13 and 14 (2048 units). If a measured value is outside a tolerance band above and
below the setpoint, an error bit is set.
The actual values for the two channels are stored in message 17, along with the actual temperature
values of the controller.
(The resolution is 10 mV.)
The sampling time for the two transducer inputs 13 and 14 is as follows:
jumper D inserted:
jumper D not inserted:
Channels 13 and 14 are only processed if the appropriate parameters are set. They are not
processed with hot channel control, heating current monitoring or Pt 100 operation.
1.1.7 Comparator (Variant -3AA22 only)
The comparator supplies a 24 V signal at digital output K, when the voltage applied to channel 13
reaches or exceeds a preset value in the range from 0 to 1024 = 0 to 10.24 V. The comparator
cannot be switched over to channel 14.

1.1.8 Software Release

The software release is stored at address 7FFFH in the firmware. It can be read by the PLC from
byte 15 in message 16.

1.1.9 Module Number

The module number can be read from byte 14 in message frame 16 (see table below). This byte
contains the last two figures of the module's MLBF number..
Module
6ES5 244–3AA22
6ES5 244–3AB31
IP244
C79000–B8576–C860–02
Description of the Firmware
960 ms 0 to 20.48 V
––––––––––––––––––––––
800 ms 0 to 10.24 V
Byte 14 in message frame 16 (module number)
22
31
4–15