Siemens SIMATIC S5 Manual page 95

Data Exchange with the Central Controller
Byte 9 Control byte 2
* (only possible with 2-step controllers with a heating function)
0
Bit 2 When switching over to manual operation the manual manipulated variable which
is entered in byte 10 is output.
3
Bit 2 If linear sensors (e.g. pyrosensors) are to be connected to the module, the
linearization of the characteristic curve stored in the firmware must be disabled.
Values must be entered in messages 30 to 42, bytes 0 and 1 for actual value
normalization.
If linearization is switched off, line break monitoring is also disabled.
Example 1
The dual or hexadecimal representation of control bytes 1 and 2 according to the structure table
for examples 2 and 3 is as in example 1.
4–28
IP244
C79000–B8576–C860–02