Control And Status Bytes; Process Data Mode - Beckhoff KL3208 Manual

5.2

Control and status bytes

Channel 1
The control and status bytes (CB1 and SB1) for channel 1 in the process data mode [} 39] and for register
communication [} 40] are described below.
Channels 2 to 8
The control and status bytes of channels 2 (CB2 and SB2) to 8 (CB8 and SB8) have the same structure as
the control and status bytes of channel 1.
5.2.1

Process data mode

Control byte 1 (for process data mode)
Control byte 1 (CB1) is located in the output image [} 38], and is transmitted from the controller to the
terminal.
Bit CB1.7 CB1.6
Name RegAccess -
Key
Bit Name Description
CB1.7 RegAccess 0
CB1.6 - 0
CB1.5 Cali 1
CB1.4 Gain 1
CB1.3 Offset 1
CB1.2 Clock 0
1
CB1.1 up 1
CB1.0 down 1
Status byte 1 (for process data mode)
The status byte 1 (SB1) is located in the input image [} 38] and is transmitted from terminal to the controller.
Bit SB1.7 SB1.6
Name RegAccess Error
Key
Bit Name
SB1.7 RegAccess
SB1.6 Error
SB1.5 ... -
SB1.2
SB1.1 Overrange
SB1.0 Underrange
KL3208, KL3228/KS3228
CB1.5 CB1.4
Cali Gain
Register communication off (process data mode)
bin
reserved
bin
Terminal compensation
bin
function is activated
Gain calibration
bin
Offset calibration
bin
slow clock
bin
fast clock
bin
up
bin
down
bin
SB1.5 SB1.4
- -
Description
0 Acknowledgement for process data mode
bin
1 General error bit
bin
0 reserved
bin
1 Process data too large
bin
1 Process data too small
bin
Version: 3.3.0
Access from the user program
CB1.3 CB1.2
Offset Clock
A gain and offset calibration of the terminal can
be carried out with the control byte in process
data mode. The code word must be entered in
register R31 so that the calibration can be
carried out.
The parameter will only be saved permanently
once the code word is reset!
SB1.3 SB1.2
- -
CB1.1 CB1.0
up down
SB1.1 SB1.0
Overrange Underrange
39