Technical equipment of TC600 PLC
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TXV 138 08.02
5.2 Special Functions
Basic BM functions of TC603 to TC607 can be extended by special
functions.
Special functions use standard-fitted inputs, or possibly PLC outputs, but
their attendance requires more complex shell algorithms or complementa-
tion of the basic technical equipment of the input and output unit. These
serving algorithms are realized by the system program, thus servicing per-
formed by the user program remains simple.
Special functions are complemented to selected BM types per order (see
Article 2.5). Always one special function may be complemented only.
5.2.1 Interrupt
Inputs
Interrupt inputs allow for fast access to user programs for servicing of
time critical operational states of the controlled object, and processing of
fast changes of input signals processing of which by standard binary inputs
is not possible.
Change of state of binary inputs DI0, DI1, DI2 or DI3 is done by the inter-
ruption process P42 which may be used to service the state. At the same
time, flags are set determining source of the interrupt in the STAT state
word. Activation of the interruption process from individual inputs can be
controlled by setting the relevant bits of the CONT control word. In every
input, it is possible to individually set the signal edge that activates the inter-
rupt.
Interrupt inputs do not disturb neither limit basic functions of inputs DI0 to
DI3 described under item 5.1.1.
TC601, TC602
TC603 to TC607
Number of interrupt inputs
-
4
Voltage for log. 0
(opening of the circuit)
max. 14V-, 13.5V~
Voltage for log. 1
(closing of the circuit)
min. 18.5 V-, 17.5 V~
max. 30 V-, 30 V~
Delay from log. 0 to log.1
max. 5
s
Delay from log. 1 to log.0
max. 5
s
Width of the input pulse
min. 30
s
Interrupt period
see item 10.5.8
Response time of the PLC
see item 10.5.8
For other parameters see item 5.1.1.
5.2.2
Counter of Type 3
Counter of type 3 is a unidirectional 16 bit counter of external events
equipped with pre-selection, counting (CLK) and resetting input (RESET).
The counter can operate as a freely running counter (in the range of 0 to
65535) or self-filling counter (in the range of 0 to pre-selection).
The binary input DI0 is used as the CLK input, binary input DI1 is used as
the RESET input. When the RESET input state corresponds with log. 1
(closed input), the counter counts ascending edges of signals on the CLK
input. When the RESET input state corresponds with log. 0 (open input), the
counter is reset permanently. Overflow of the counter range or reaching of
the pre-selection will evoke interruption process P44 of the user program. At
the same time, setting of relevant bits in the STAT state word of the coun-
ter. Reset and blocking of the counter can be also done from within the user
program by setting the relevant bit in the CONT control word of the counter.
Use of binary inputs as the counter inputs does not disturb neither limit
their basic function described under item 5.1.1.
Properties of interrupt
inputs
Parameters of
interrupt inputs
Properties of the type
3 counter
