Table 2- 5 Protocol Parameters (3964(R) Procedure) - Siemens Simatic S7-300 CP 341 User Manual

Protocol parameters
You can only assign the protocol parameters if you have not specified the default values for
the protocol.
Table 2- 5 Protocol parameters (3964(R) procedure)
Parameters Description
Character delay time The character delay time defines the
maximum permissible time that may
elapse between two received characters
in a frame.
Acknowledgment delay The acknowledgment delay time defines
time the maximum permissible time that may
elapse before the partner's
acknowledgment arrives during
connection setup (time between STX and
partner's DLE acknowledgment) or
release (time between DLE ETX and
partner's DLE acknowledgment).
Connection attempts This parameter defines the maximum
number of attempts of the CP 341 to set
up a connection.
Transmission attempts This parameter defines the maximum
number of attempts to transfer a message
frame (including the first one) in the event
of errors.
CP 341 Point-to-Point Communication, Installation and Parameter Assignment
Manual, 09/2008, A5E02191071-01
www.gkbpx.com
Basic Principles of Serial Data Transmission
Range of values
20 ms to 655350 ms in 10 ms
increments
The shortest character delay
depends on the baud rate:
300 bps:
600 bps:
1200 bps:
2400 to 115200 bps:
20 ms to 655350 ms in 10 ms
increments
The shortest acknowledgment
delay depends on the baud rate:
300 bps:
600 bps:
1200 bps:
2400 to 115200 bps:
1 to 255
1 to 255
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2.8 Configuration data
Default value
220 ms
60 ms
40 ms
30 ms
20 ms
2000 ms
(550 ms for 3964
without block
check)
60 ms
40 ms
30 ms
20 ms
6
6
81