Siemens SIMATIC S7 System Manual page 252
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Point-to-Point (PtP) communications
8.7 Point-to-Point instructions
You can set up the initial static configuration of the port in the device configuration
properties, or just use the default values. You can execute the SEND_CFG instruction in
your program to change the configuration. The SEND_CFG configuration changes are not
permanently stored in the PLC. The parameters configured in the device configuration are
restored when the CPU transitions from RUN to STOP mode and after a power cycle. See
Configuring the transmit (send) and receive parameters (Page 241).
Parameter
REQ
PORT
RTSONDLY
RTSOFFDLY
BREAK
IDLELINE
DONE
ERROR
STATUS
STATUS
(W#16#....)
80B0
80B1
80B2
252
Parameter
Data type
type
IN
Bool
IN
PORT
IN
UInt
IN
UInt
IN
UInt
IN
UInt
OUT
Bool
OUT
Bool
OUT
Word
Description
Transmit interrupt configuration is not allowed
Break time is greater than the allowed value (2500 bit times)
Idle time is greater than the allowed value (2500 bit times)
Description
Activate the configuration change on the rising edge of
this input.
Communication port identifier:
This logical address is a constant which can be
referenced within the "Constants" tab of the default tag
table.
Number of milliseconds to wait after enabling RTS
before any Tx data transmission occurs. This
parameter is only valid when hardware flow control is
enabled. 0 - 65535 ms. 0 will disable the feature.
Number of milliseconds to wait after the Tx data
transmission occurs before RTS is disabled: This
parameter is only valid when hardware flow control is
enabled. 0 - 65535 ms. 0 will disable the feature.
This parameter specifies that a break will be sent upon
the start of each message for the specified number of
bit times. The maximum is 65535 bit times. 0 will
disable the feature. 8 second maximum
This parameter specifies that the line will remain idle
for the specified number of bit times before the start of
each message. The maximum is 65535 bit times. 0 will
disable the feature. 8 second maximum
TRUE for one scan, after the last request was
completed with no error
TRUE for one scan, after the last request was
completed with an error
Execution condition code
System Manual, 11/2009, A5E02486680-02
S7-1200 Programmable controller
- Quick Links:
- Introducing the S7-1200 Plc
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