Siemens SIMATIC FM 452 Manual page 57

Execution Times
The following table provides you with an overview of the execution times of the
functions for the FM 452. The run time from the first block call to the done
message (trigger bit is reset) is shown. The cycle is extended by between 1 and
2 ms when a function is called.
Table 6-4 Execution Times of the Functions for the FM 452
Block Block
FC 0 FC CAM_INIT
FC CAM_CTRL
control/return signal
MDWR_EN
MDWR_EN und MD_EN
CAM1WR_EN (0 cams enabled)
CAM1WR_EN (16 cams enabled)
REFPT_EN
SIM_ON
AVAL_EN
FVAL_EN
ZOFF_EN
CH01CAM_EN
FC 1
CH16CAM_EN (1 cam with check)
CH16CAM_EN (1 cam no check)
CH16CAM_EN (16 cams with check)
CH16CAM_EN (16 cams without check)
MDRD_EN
CAM1RD_EN
MSRRD_EN
CNTTRC_EN
ACTPOS_EN
ENCVAL_EN
CAMOUT_EN (FM_TYPE = 0, 16 bytes)
CAMOUT_EN (FM_TYPE = 1, 24 bytes)
FC CAM_DIAG
FC 2 Idle run
Read diagnostic buffer
FC 3 FC CAM_MSRM
FM 452 Electronic Cam Controller
C79000-G7076-C452-04
Block Name/Job Block Name/Job
Programming the FM 452
CPU 416-2 (6ES7 416-2XK01-0AB0)
Execution Time in ms
0.01
0.06
11.8
15.6
3.1
5.4
2.2
2.3
2.3
2.3
2.3
2.3
2.3
2.3
9.2
8.5
1.6
2.1
1.0
1.0
1.0
1.0
1.1
1.1
0.02
1.9
0.5
6-19