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Configuring and Parameter Assignment the CP 440
5.4 Configuration data
5.4.4
Configuration Data of the 3964(R) Procedure
Introduction
Using the parameter assignment data of the 3964(R) procedure, you can adjust the CP 440
to suit the properties of its communication partner.
Configuration Data of the 3964(R) Procedure
With the CP 440: Point-to-Point Communication, Parameter Assignment interface, specify
the parameters for the physical layer (layer 1) and the data-link layer (layer 2) of the 3964(R)
procedure. Below you will find a detailed description of the parameters.
Note
The 3964(R) procedure can only be used in four-wire mode.
Protocol
The following table describes the protocol.
Table 5-10
3964(R) Protocol
Parameters
Description
The protocol parameters are set to default values.
3964 with default
•
values and no
If the CP 440 recognizes the string DLE ETX, it stops receiving
•
block check
and sends a DLE to the communication partner if the block was
received undamaged, or an NAK if it was damaged.
The protocol parameters are set to default values.
3964(R) No
•
Default Values
If the CP 440 recognizes the string DLE ETX BCC, it stops
•
With Block Check
receiving and compares the received block check character with
the longitudinal parity calculated internally. If the BCC is correct
and no other receive errors have occurred, the CP 440 sends
the code DLE to the communication partner. If the BCC is
correct and no other receive errors have occurred, the CP 440
sends the code DLE to the communication partner (the NAK
code is sent if an error occurs).
The protocol parameters are programmable.
3964
•
programmable
If the CP 440 recognizes the string DLE ETX, it stops receiving
•
without block
and sends a DLE to the communication partner if the block was
check
received undamaged, or an NAK if it was damaged.
The protocol parameters are programmable.
3964(R) No
•
Default Values
If the CP 440 recognizes the string DLE ETX BCC, it stops
•
With Block Check
receiving and compares the received block check character with
the longitudinal parity calculated internally. If the BCC is correct
and no other receive errors have occurred, the CP 440 sends
the code DLE to the communication partner. If the BCC is
correct and no other receive errors have occurred, the CP 440
sends the code DLE to the communication partner (the NAK
code is sent if an error occurs).
76
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Point-to-point connection CP 440 Installation and Parameter Assignment
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Default Value
3964(R) Default Values With
Block Check:
CDT = 220 ms
ADT = 2000 ms
Setup attempts = 6
Transmission attempts = 6
Manual, 09/2007, A5E00057742-03
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