BECKHOFF KL1501 - Manual (Page 13)

Terminal configuration
KL1501 11
3.3 Control and Status Byte
The control byte is transmitted from the controller to the terminal. It can be
used
- in register mode (REG = 1
bin
) or
- during process data exchange (REG = 0
bin
).
Control byte during process data exchange
The control byte triggers various actions in the counter terminal KL1501
during process data exchange:
MSB
REG=0 0 CNT_SET CNT_INH SET_OUT2 SET_OUT1 EN_OUT2 EN_OUT1
Bit Function
CNT_SET The counter is set to the value that is specified via the process
data. Setting of the counter can be edge or level-controlled
(see R32.3).
CNT_INH The counter is stopped as long as this bit is active. In doing so,
the old counter status is retained.
If two counters are active, the second counter can be set with
this bit.
SET_OUT2 Sets the second output
SET_OUT1 Sets the first output
EN_OUT2 This bit enables the internal function activated by R32.
EN_OUT1 This bit enables the internal function activated by R32.
Setting the outputs
OUT1, OUT2
The functions for setting the outputs can be armed with the control bits
EN_OUT1, EN_OUT2. The control bits SET_OUT1 and SET_OUT2 are
ignored when EN_OUT1, EN_OUT2 is set.
Status byte during process data exchange
The status byte is transferred from the terminal to the control system. The
status byte contains various status bits of the counter terminal KL1501:
MSB
REG=0 0 SET_ACC INH_ACC ST_OUT2 ST_OUT1 ST_V/R ST_CLK
Bit Function
SET_ACC The data for setting the counter has been accepted from the
terminal.
INH_ACC The counter is stropped for as long as this bit is set.
ST_OUT2 The status of output OUT2 is reflected in this bit.
ST_OUT1 The status of output OUT1 is reflected in this bit.
ST_V/R The status of the V/R input is reflected in this bit.
ST_CLK The status of the CLOCK input is reflected in this bit.