Beckhoff KL1501, Документация

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Access from the user program
KL1501, KL1512 34 Version: 3.1.0
5.7 Control and status byte
The control byte is transferred from the controller to the terminal. If can be used
• in register mode [
}
36] (REG = 1
bin
) or
• in process data exchange [
}
34] (REG = 0
bin
).
5.7.1 KL1501 - Process data exchange
Control byte in process data exchange (REG=0)
During process data exchange, the control byte is used to trigger various actions in the KL1501 counter
terminal:
Bit 7 6 5 4 3 2 1 0
Name REG=0 0 CNT_SET CNT_INH SET_A1 SET_A0 EN_A1 EN_A0
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-controlled or level-controlled (see R32.3).
CNT_INH The counter is stopped, as long as this bit is active. The old counter value is maintained.
If two counters are active, the second counter can be set with this bit.
SET_A1 Sets the second output
SET_A0 Sets the first output
EN_A1 This bit enables the internal function that was activated via R32.
EN_A0 This bit enables the internal function that was activated via R32.
• Setting outputs A0, A1
The control bits EN_A0 and EN_A1 can be used to activate the functions for setting the outputs. The
control bits SET_A0 or SET_A1 are ignored if EN_A0, EN_A1 are set.
Status byte in process data exchange (REG=0)
The status byte is transferred from the terminal to the controller. The status byte contains various status bits
of the KL1501 counter terminal
Bit 7 6 5 4 3 2 1 0
Name REG=0 0 SET_ACC INH_ACC ST_A1 ST_A0 ST_V/R ST_CLK
Bit Function
SET_ACC The data for setting the counter were accepted by the terminal.
INH_ACC The counter is stopped as long as this bit is set.
ST_A1 This bit indicates the state of output A1.
ST_A0 This bit indicates the state of output A0.
ST_V/R This bit indicates the state of the up/down input.
ST_CLK This bit indicates the state of the CLOCK input.