Configuration and operation
4.5 Telecontrol communication (CP 1542SP-1 IRC)
CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
Operating Instructions, 01/2017, C79000-G8976-C426-03
83
Enable identifier for processing status
If this option is enabled in STEP 7, a status is output on the CP that provides information
about the processing status of the sent message. The status is written to a PLC tag of the
type DWORD. Select this tag via the "PLC tag for processing status" box.
If there are problems delivering messages, you can determine the status for example via the
Web server of the CPU by displaying the value of the PLC tag there.
For the significance of the individual statuses, refer to the section Processing status of the
telecontrol e-mails (Page 104).
Security > CP identification
CP identification
Only valid when using the "TeleControl Basic" protocol.
● Project number
The project number is the same for all telecontrol CPs in a STEP 7 project. TCSB
evaluates project numbers from 1 ... 2000. If you change the project number, this
parameter is changed for all CPs in the STEP 7 project.
● Station number
For each station with a telecontrol CP, an individual station number is configured. TCSB
evaluates station numbers from 1 ... 8000.
● Telecontrol password
Password for the authentication of the CP on the telecontrol server. 8 ... 29 characters of
the ASCII character set 0x20...0x7e. The password can be the same for all CPs of the
STEP 7 project.
The same password is configured in the "TCSB" application for this station.
Security > DNP3 security options
Authentication and key exchange with the DNP3 protocol
If the Security functions are enabled, the master and station (CP) authenticate themselves
with a secret key, the pre-shared key.
With the help of the common pre-shared key, after the first connection establishment
between master and DNP CP session keys are agreed that are then renewed cyclically.
Renewal of the session keys is normally initiated by the master. The criteria for renewing the
key are specified in the following parameters.
● Authentication requests before key exchange
● Key exchange interval
As soon as one of these conditions is met, the session key is renewed.
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