Communications Capabilities
S5-115U Manual
Special Points to Observe when Using the CP 525 and CP 526 in RESTART Mode
Note
If the CP 525 and CP 526 are used in the S5-115U, the interprocessor communication
flag area enabled on the CPs in RESTART mode should be reset on restart in connection
with the following CP functions:
CP 525 (6ES5 525-3UA11):
- Component:
Event printer if group disable bits are used
- Component:
Operator-process communication and visualization with the 3975
display unit if bit set and reset commands are used
general:
Group disable bits should always be located in the interprocessor
communication flag area enabled per jumper setting.
CP 526 (6ES5 526-3Lxxx):
- Basic board:
If bit set and reset commands are used
Before synchronizing the CPs, an FB should be called in OB21/22. This FB should be programmed
as shown in the following example:
Example:
Function block FBxxx (e.g. FB11) for resetting the interprocessor communication flag area on a CP.
The communication flag areas enabled by jumpers on the CP can be reset with the following
block. This FB must be specified with its starting flag byte (V-FY) and end flag byte (B - FY) for each
contiguous communication flag area.
If a flag byte that does not define an area boundary is specified here, the entire area is still reset.
V-FY
:
FY35
(from)
B-FY
:
FY165
(to)
This resets the communication flag area from flag byte FY 32 to flag FY 191. This area must
naturally have been enabled on the CP.
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