Siemens SIMATIC CP 340 User Manual

Communication using function blocks
6.3 Using the function blocks for connecting to a communications processor
PtP coupling and configuration of CP 340
112 Manual, 04/2011, A5E00369892-03
Time Sequence Chart for FB 2 P_RCV
The figure below illustrates the behavior of the parameters NDR, LEN and ERROR,
depending on how the EN_R and R inputs are wired.
1'5
(1B5
5
(5525
(QDEOHUHFHLYH 7HUPLQDWLRQZLWKRXWHUURU 5HFHLYLQJ 7HUPLQDWLRQZLWKHUURU 5HFHLYLQJLVVZLWFKHGRII 1RWUHFHLYLQJ 5(6(7 7HUPLQDWLRQZLWKRXWHUURU 5HFHLYLQJ 7HUPLQDWLRQZLWKHUURU
/(1
OHQJWK
Figure 6-2 Time Sequence Chart FB_2_P_RCV
Note
The EN_R input must be set statically to "1". The EN_R parameter must be supplied with
logic operation result "1" throughout the entire receive request.

Siemens SIMATIC CP 340 Specifications

General

Brand	Siemens
Model	SIMATIC CP 340
Category	Computer Hardware
Language	English