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Programming the FM 453
6.8
Technical Specifications
Memory Allocation
The following table gives you an overview of the memory allocated to FCs.
Table 6-9
1
2
3
4
5
6
Processing Times
The following average processing times for FCs were measured with a CPU
413. The specified times are rounded:
Table 6-10
INIT_DB
MODE_WR
RD_COM
DIAG_RD
MSRMENT
DIAG_INF
6-46
Memory Allocated to FCs
No.
FC
Block in Bytes
INIT_DB
224
MODE_WR
1226
RD_COM
774
DIAG_RD
302
MSRMENT
288
DIAG_INF
282
Processing Times of FCs
FC
Transfer
–
Write control/checkback sig-
nals without data (job = 0)
Write control/checkback sig-
nals with data (job > 1)
Read data
Read process and diagnostic
interrupt data
MC7 Code in
Bytes
120
970
584
180
172
166
Cycle 1
Cycle 2
–
–
0.8 ms
–
0.9 ms
2.5 ms
2.4 ms
–
2.2 ms
–
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Local Data in
Bytes
4
26
24
34
26
26
Cycle 3
–
–
0.9 ms
–
–
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