BECKHOFF KL3681 - Manual (Page 29)

Access from the user programm
Bit Name Description
CB.7 RegAccess 0
bin
Register communication off (process data mode)
CB.6 R/W 0
bin
Read access
1
bin
Write access
CB.5 StartCalibration 1
bin
initiates an automatic correction of the internal measuring range
(only if register R33 = 4)
CB.4 disAutorange 0
bin
auto range enabled
1
bin
auto range disabled
CB.3 Voltage/Current 0
bin
Voltage
1
bin
Current
CB.2 DC/AC 0
bin
DC
1
bin
AC
CB.1, CB.0 Range Measuring range (see also CB.2)
00
bin
3 V or 1 A
01
bin
30 V or 10 A
10
bin
300 V
11
bin
300 mV or 100 mA
Status byte (in process data mode)
The status byte (SB) is located in the input image [ } 28] and is transmitted from terminal to the controller.
Bit SB.7 SB.6 SB.5 SB.4 SB.3 SB.2 SB.1 SB.0
Name RegAccess Error ­ noAutorange data Invalid extended range overrange underrange
Bit Name Description
SB.7 RegAccess 0
bin
Acknowledge for process data mode
SB.6 Error 1
bin
measuring range exceeded, over or under range, the error LED
shines or converting error or invalid measuring range
SB.5 reserved 0
bin
reserved
SB.4 ­ 0
bin
auto range is enabled
1
bin
auto range is disabled
SB.3 data invalid 1
bin
invalidprocess data, e.g. invalid value, e.g. filter latency, start up
SB.2 extended range* 1
bin
The extended measuring range (~10% of upper range value) is
used (hysteresis area of auto range functionality).
SB.1 overrange 1
bin
Exceeding of the electrical measuring range
SB.0 underrange 1
bin
Undershooting of the electrical measuring range at DC mode
(not displayed in AC mode
*) The extended range is only available for the measuring ranges 300 mV, 3 V, 30 V and 100 mA.
Register communication
Control byte (at register communication)
The control byte (CB) is located in the output image [ } 28] and is transmitted from the controller to the
terminal.
Bit CB.7 CB.6 CB.5 CB.4 CB.3 CB.2 CB.1 CB.0
Name RegAccess R/W Register no.
KL3681, KS3681 29 Version 2.0.0