Lenze ECSCAxxx - Manual (Page 382)

Appendix
Memories
RAM memory access via codes
14
l
382 EDBCSXA064 EN 3.2
IMPORTANT Possible settings Code
Selection Lenze/
{Appl.} Designation No.
C0505 0 Offset address within the RAM
block selected via C0506 ^ 381
0 {1} 65532
C0506 1 Selection of the RAM block for
access via C0509
^ 381
1 RAM block 1
2 RAM block 2
C0507 0 Value read from the RAM block
l After reading, the pointer to
the memory address is
automatically incremented by
4 bytes.
^ 381
0 {1} 65532
C0508 0 Value to be written into the RAM
block
l After writing, the pointer to
the memory address is
automatically incremented by
4 bytes.
^ 381
0 {1} 65532
C0509 CmpChecksRa
m
0 Check sum verification ^ 381
0 Inactive Stop the PLC during the check
sum verification to avoid a
time−out when reading back the
code.
1 Active
Auto increment access
Reading/writing of the corresponding 4 data bytes is effected by means of the "auto
increment access", i. e. the pointer to the corresponding address in the selected RAM block
is automatically incremented by 4 bytes after every reading of the code C0507, or after
writing of the code C0508.
Example: reading of successive "double integer" values from the RAM block by means of
auto increment access
0
Offset
C0505
auto-increment
(+4 bytes)
65532
4 bytes
4 bytes
4 bytes
4 bytes RAM
block
4 bytes
0
Offset
C0505
auto-increment
(+4 bytes)
65532
4 bytes
4 bytes
4 bytes
4 bytes
4 bytes
0
Offset
C0505
auto-increment
(+4 bytes)
65532
4 bytes
4 bytes
4 bytes
4 bytes
4 bytes
1. 2. 3.
C0507 C0507 C0507
ECSXA297
Fig. 14−3 Example: auto increment access