Manual BG41/BG42/BG43 Software
Rev. 99/49 4-41
4.1.8 Handling with prozedure 3964(R) with RK512
4.1.8.1 General
The building blocks BG41, BG42 and BG43 can be operated with the procedure 3964(R) in
connection with the RK512 protocol. It is not necessary to select the procedure with the FB100 or
FB101 as this is carried out by the FB27 (SYNCHRON).
A 3964(R) operation is not possible on channel 3 of BG43.
If the 3964(R) operation is required on all three channels, the firmware
4017v5x is to be used.
The procedure 3964 differs from the 3964R in two points of the procedure:
•= the BCC byte is dropped in the procedure 3964. DLE/ETX applies for the end of the telegram.
•= Acknowledgement delay time
In procedure 3964: QVZ = 550 ms.
In procedure 3964R: QVZ = 2000 ms
In order to be able to work with the procedure 3964 or 3964R (called 3964(R) in the following) with
the RK512 protocol, the following VIPA data handling blocks have been made available:
SYNCHRON FB27 (from firmware level 401xV50 and 4118)
With this function block the building block is set to operate with the procedure 3964(R) and RK512
protocol, the baud rate and the data transmission format is selected, and the block size and priority
are set.
Difference to FB20: Input of a character delay time (ZVZ)
Input of an acknowledgement delay time (QVZ)
SYNCHRON FB20 (up to firmware level 401xV41)
This function block is to be used instead of FB27, if firmware level 4.1 or older are to be used.
RECEIVE FB21
With this function block telegrams are received from partner equipment, whereby the target
information from the telegram header are not used, but are replaced by the target definitions given in
the formal operands.
SEND FB23
This function block is used for sending an outgoing telegram to a partner equipment.
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