13
Allocations for Built-in CPU Unit Inputs Section 2-1
puts IN2, IN3, and IN5 are used for the origin search function when the or-
igin search function for pulse output 1 is enabled in the PLC Setup.
• General-purpose inputs 0 and 1, interrupt inputs 0 and 1, and quick-
response inputs 0 and 1 cannot be used when the origin search function
for pulse output 0 is being used. Also, general-purpose input 4 cannot be
used if operating mode 2 is specified, i.e., the Positioning Completed Sig-
nal is being used.
• General-purpose inputs 2 and 3, interrupt inputs 2 and 3, and quick-
response inputs 2 and 3 cannot be used when the origin search function
for pulse output 1 is being used. Also, general-purpose input 5 cannot be
used if operating mode 2 is specified, i.e., the Positioning Completed Sig-
nal is being used.
Functions
Item Specifications
1) General-purpose inputs
(10 inputs max.)
The CPU Unit's built-in inputs (bits 00 to
09 of CIO 2960) can be used as general-
purpose inputs.
Note 1: The inputs can be refreshed
immediately with the immediate refresh-
ing variation (! prefix) of instructions
such as LD.
Note 2: The same input time constant is
used for all 10 inputs and set in the PLC
Setup. The setting range is 0 to 32 ms
and the default setting is 8 ms.
2) Interrupt inputs
(4 inputs max.)
Direct mode Interrupt tasks 140 to 143 can be con-
trolled by the CPU Unit's built-in inputs
(bits 00 to 03 of CIO 2960) and the inter-
rupt tasks can be set to start on the ris-
ing or falling edge of the control bits, i.e.,
up or down differentiation.
The response time (between the estab-
lishment of the input condition and exe-
cution of the interrupt task) is
approximately 0.2 ms.
Note Use the MSKS(690) instruction to
specify Direct or Counter mode
operation as well as up or down
differentiation.
Counter mode The rising or falling edge of the inputs
(bits 00 to 03 of CIO 2960) can be
counted as an incrementing or decre-
menting counter with a maximum
response frequency of 1 kHz. The corre-
sponding interrupt task (140 to 143) can
be executed when the counter counts
out.
3) Quick-response inputs
(4 inputs max.)
The CPU Unit's built-in inputs (bits 00 to
03 of CIO 2960) can be used as quick-
response inputs. Inputs with an input sig-
nal width as short as 30 µs can be
received reliably regardless of the cycle
time and the input signal will be kept on
for 1 cycle.
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