User Manual

Siemens Building Technologies PROFIBUS DP/P-bus link
Building Automation User's guide 4-1
4 Module data
4.1 Digital modules
This section shows how the digital signals/channels of the DESIGO I/O modules are displayed
in the SIMATIC S7.
4.1.1 Digital input modules
The digital channels are displayed right-justified and in ascending order, so that the first channel
is mapped to Bit 0.
Type MSB
Input byte
LSB
PTM1.2D20 0 0 0 0 0 0 i2 i1
PTM1.4D20 0 0 0 0 i4 i3 i2 i1
PTM1.4D20R 0 0 0 0 i4 i3 i2 i1
PTM1.8D20E i8 i7 i6 i5 i4 i3 i2 i1
PTM1.2D42 0 0 0 0 0 0 i2 i1
PTM1.2D250 0 0 0 0 0 0 i2 i1
ix i = Input bit information, x = Channel No.