Siemens S7-300 - Page 57

Programming the FM 352
7.10 High-speed access to module data
FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
57
Direct write access to control signals
The byte addresses are defined with an offset to the input address of the module. The bit
names correspond to the names in the channel DB.
In STL, you access the data using the PQB (write 1 byte) and PQW (write 2 bytes)
commands.
Address Bit number
7 6 5 4 3 2 1 0
Byte 0 Internal
Byte 1 0 CNTC1_EN CNTC0_EN CAM_EN DIR_P DIR_M 0 0
Byte 2
Byte 3
TRACK_EN
Example: Actual position value (ACT_POS)
The start address of the module is 512.
STL
L PID 516 Read the current actual position value
(ACT_POS) with direct access:
Module start address + 4