NAiS FP Series, User Manual

Page: 82 / 326

FP
Σ
6.2 Function Specifications and Restricted Items
6 - 7
6.2.2 Function being Used and Restrictions
Channel
The same channel cannot be used by more than one function.
Function
being used
Channel High-speed counter function
(Addition input and Subtraction input)
High-speed counter
function
(Two-phase input,
One input, and Direc-
tion distinction)
CH0 CH1 CH2 CH3 CH0 CH2
Pulse output
function
CH0 N/A A A A N/A A
function
CH2 A A N/A A A N/A
A: Available N/A: Not Available
Restrictions on I/O allocations
The inputs and outputs allocated to the various functions listed in the table in the
previous section “6.2.1” cannot be allocated to more than one function.
Except for the examples noted below, inputs and outputs that have been allocated to
the various functions cannot be allocated as normal inputs and outputs.
Cases in which inputs and outputs can be used as exceptions
Example 1:
If no reset input is used in the high-speed counter function,
X2 and X5 are allocated as normal inputs.
Example 2:
If no output is used to clear the differential counter in the
pulse output function, Y2 and Y5 are allocated as normal
outputs.
Restrictions on the execution of related instructions (F166 to F176)
When any of the instructions related to the high-speed counter “ F166 to F176” are
executed, the control flag (special internal relay: R903A to R903D) corresponding to the
used channel turns on.
Please be aware that the control flag is in progress may change while a scan is being
carried out. To prevent this, an internal relay should be substituted at the beginning of
the program.
When the flag for a channel turns on, another instruction cannot be executed using that
same channel.