Panasonic FP Series

System register instructions
990
Part III FP Instructions
Keyword setting
SYS1 HSC1,UP
High-speed counter setting
HSCn
n: 0 to 9, A, B with FP-X C14R, C30/60R
n: 0 to 7 with FP-X C14T, C30/60T
n: 0, 1, 2, 3 with FPΣ
UP: Addition input setting
DOWN: Subtraction input setting
Precautions during programming
 If the corresponding HSC system register is set to Unused, an operation error
occurs. Set the system register to Incremental input or Decremental input in
advance.
 Executing this instruction does not rewrite the contents of the system ROM in the
control unit. As a result, turning the power supply off and then on again rewrites
the contents of the system registers specified by the software tool.
 We recommend to execute this instruction only once, e.g. in dependency of a
rising or falling edge of an execution condition.
 When UP or DOWN has been specified, the contents of the system registers
change in accordance with the specification, so a verification error may occur in
some cases when checking or compiling the program. When BOTH have been
specified, the contents of the system registers do not change. Separate the first
and the second keyword with a comma "," e.g. HSCB,UP; do not use spaces.
Otherwise an operation error will occur.
No. IEC address Set If
R9007
R9008
%MX0.900.7
%MX0.900.8
permanently
for an instant
 any character other than a keyword is
specified
 no comma is between the first and second
keyword
 the letters used to specify the keyword are
not capitalized
 the HSC system register is set to items other
than the addition input or subtraction input
When bCountUp is set to TRUE, the function is carried out. The system register for the specified
channel is set to count up. When bCountDown is set to TRUE, the specified channel is set to
count down.
Error flags
Example
In this example the function has been programmed in ladder diagram (LD) and structured text (ST).
POU header
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