Leuze BCL34, Technical Description

Page: 72 / 102

PROFIBUS
70 BCL 34 Leuze electronic
8.3.16 Activations with ACK
Module 19
The module defines the control signals of the barcode scanner for the handshake operation
of the reading results. The controller must acknowledge the data reception via the ACK bit
before the new data is written into the input area.
Attention!
The joint use of modules 18 and 19 may cause malfunctions! Use only one of the two mod-
ules at a time.
Parameters
none
Input Data
none
Output Data
Output Data Description Rel.
addr.
Data
type
Value Range Default Unit CR to
module
Scan gate time
Signal, activates the reading gate 0.0 Bit
1 -> 0: Reading gate off
0 -> 1: Reading gate active
0 –
Free 0.1 Bit 0 –
Free 0.2 Bit 0 –
Free 0.3 Bit 0 –
Acknowledge
The toggle bit signals via positive and neg-
ative edge that data has been processed by
the master.
0.4 Bit
0 -> 1: Data has been proc-
essed by the master
1 -> 0: Data has been proc-
essed by the master
0 –
Data reset
Signal, resets the following bit states and
decoder results:
• Module 16: Bit 0.1, input data
• Module 20: Bit 0.0, input data
Bit 0.1, input data
Bit 0.2, input data
• Module 21 … 27: Data, when the
parameter "Decoding result at reading
gate start" (module 12) has been set to
value 1 (input data are reset to the init.
value).
0.5 Bit
0: Off
1: Data reset
0 –
12b
16e
20abc
21 … 27i
System reset
Signal, triggers a system reset if the level
changes from 0 to 1.
0.6 Bit
0: Run
0 -> 1: Reset
0 –
Standby
Signal, activates the standby function 0.7 Bit
0: Standby off
1: Standby on
0 – 20h
Output data length: 1 byte
a
b
c
d
e
f
g
h