Siemens SIMATIC S7 CP340 - Page 67

5 MODBUS RTU Protocol communication
CP340/CP341/CP440/CP441 Communication and Programming
Entry-ID: 88867653, V1.0, 02/2014
67
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2. The FB180 parameter setting is shown in the table below:
Name
Data type
comments
ID
INPUT/INT
Local ID number, which is obtained from the
PtP connection properties and is
hexadecimal.
START_TIMER
INPUT/TIMER
Initialization timeout timer, which is T5 in
this example
START_TIME
INPUT/S5TIME
initialization timeout time value, which is 5s
in this example
STATUS_TIMER
INPUT/TIMER
communication status read timer, which is
T6 in this example
STATUS_TIME
INPUT/S5TIME
communication status read time value,
which is 2S in this example
OB_MASK
INPUT/BOOL
IO access error mask bit, which is M20.0 in
this example
0：Non-mask IO access error
1：Mask IO access error, and delaying the
alarm
CP_START
INPUT/BOOL
FB initialization enable bit, which is M20.1 in
this example
CP_START_FM
INPUT/BOOL
CP_START initialization rising edge bit,
which is M20.2 in this example
CP_NDR
OUTPUT/BOOL
CP write operation bit, which is M20.3 in this
example
CP_START_OK
OUTPUT/BOOL
initialization succeed complete bit, which is
M20.4 in this example
CP_START_ERR
OR
OUTPUT/BOOL
initialization error flag, which is M20.5 in this
example
ERROR_NR
OUTPUT/WORD
error number, which is MW22 in this
example
ERROR_INFO
OUTPUT/WORD
Error message, which is MW24 in this
example. Refer to the Manual for diagnosis
information
Table 15: Parameter definition of FB180