5: S
PECIAL
F
UNCTIONS
5-34
FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y-B1268
Interrupt Input
All MicroSmart CPU modules have an interrupt input function. When a quick response to an external input is required,
such as positioning control, the interrupt input can call a subroutine to execute an interrupt program.
Four inputs I2 through I5 can be designated to execute interrupt at a rising and/or falling edge of input pulses. When an
interrupt is initiated by inputs I2 through I5, program execution immediately jumps to a predetermined label number
stored in special data registers D8032 through D8035, respectively. The Function Area Settings dialog box is used to des-
ignate inputs I2 through I5 as an interrupt input, normal input, high-speed counter input, or catch input.
Normal input signals to input terminals are read when the END instruction is executed at the end of a scan.
Since these settings relate to the user program, the user program must be downloaded to the MicroSmart after changing
any of these settings.
Interrupt Input Terminals, Special Data Registers, and Special Internal Relays for Interrupt Inputs
Group
Interrupt Input No.
Interrupt Input Jump Destination Label No.
Interrupt Input Status
Group 1
I2
D8032
M8140
Group 2
I3
D8033
M8141
Group 3
I4
D8034
M8142
Group 4
I5
D8035
M8143
Programming WindLDR
1.
From the WindLDR menu bar, select
Configuration
>
Input Configuration
.
The Function Area Settings dialog box for Input Configuration appears.
Interrupt Input Rising/Falling
Edge Selection
Interrupt at Rising Edge
Interrupt occurs when the inter-
rupt input turns on.
Interrupt at Falling Edge
Interrupt occurs when the inter-
rupt input turns off.
Interrupt at Both Edges
Interrupt occurs when the inter-
rupt input turns on or off.
2.
Select
Interrupt Input
in the Groups 1 through 4 pull-down list boxes. the Interrupt Input dialog box appears.
3.
Select an interrupt edge in the pull-down list for each group.
Disable and Enable Interrupts
The interrupt inputs I2 through I5 and timer interrupt are normally enabled while the CPU is running, and can also be
individually disabled using the DI instruction or enabled using the EI instruction. When interrupt inputs I2 through I5 are
enabled, special internal relay M8140 through M8143 are turned on, respectively. See page 11-7 (Advanced Vol.).
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
