6
- 176
6.22 High Speed Interrupt Function
6.22.4 Restrictions
6
FUNCTIONS
* 1: There are two types of Online change (Write during RUN): online change in ladder mode and
online change in file units.
(2) Items that are restriced on the high speed interrupt
Table6.48 Items that are completely disabled (Continued)
No.
Item
Restriction
When Used
9
Interrupt program (I0 to I48,
I50 to I255), fixed scan
execution type program
Interrupt program (I0 to I48, I50 to I255) and
fixed scan execution type program is not
available.
Since multiple interrupts are disabled, high speed interrupt is not
available at preset cycle while any interrupt or fixed scan execution type
program is run.
10
Online change (Write during
RUN)
*1
Online change (Write during RUN)
*1
is not
executable.
Interrupts are disabled during execution of online change. During online
change execution, the start of high-speed interrupts is delayed,
resulting in not executing high-speed interrupts at preset cycle.
(The start will be delayed for the following time.
• Maximum 102 s for online change in ladder mode
• Maximum 300ms for online change in file units)
11
File registers having the
same file name as the
program name
File registers having the same file name as the
program name is not available.
Since interrupt is disabled when file registers having the same file name
as the program name are changed, high speed interrupt is not available
at preset cycle.(The following time is taken.
• Max. 410 s for standard RAM
• 400 s + 100 s number of program files for SRAM card)
12
Local devices
Local devices are not available.
Since interrupt is disabled when local devices are changed, high speed
interrupt is not available at preset cycle.
(The following time is taken.
• 390 s+170 s n for standard RAM
• 390 s+950 s n for SRAM card
n: number of program files)
13
Command of intelligent
function module that
accesses CPU module
Issue of CPU access command from intelligent
function module that accesses CPU module,
e.g. QJ71C24 or QJ71E71, is not available.
Since interrupt is disabled at the time of CPU access command issue, a
high speed interrupt start is delayed during that period and high speed
interrupt is not available at preset cycle.
N points read/write: (0.07 N+34) s
N points random read/write: (0.07 N+101) s
14
Monitor via other station
Monitor via CC-Link IE controller network,
MELSECNET/H, QJ71C24 or other intelligent
function module is not available during host
monitoring.
If host monitor request and intelligent function module-relayed monitor
request overlap, interrupt disable processing time increases. Therefore,
a high speed interrupt start is delayed (102 s) during that period and
high speed interrupt is not available at preset cycle.
15
Interrupt counter
Interrupt counter corresponding to interrupt
pointer I49 is not available.
If there is interrupt counter setting, setting for I49 is ignored and high
speed interrupt I49 is executed properly.
(For other interrupt pointers, interrupt programs are not available and
interrupt counters are executed.)
Table6.49 Items that are disabled only within high speed interrupt
No.
Item
Restriction
When Used
1
Device comment
In high speed interrupt program, device
comment that is the same as program
name is not saved/restored.
Device comment in high speed interrupt program is
overwritten.
2
Index register
In high speed interrupt sequence, index
register is not saved/restored.
Index register in high speed interrupt program is overwritten.
3
Bus access flag SM390
In high speed interrupt program, bus
access flag SM390 is not saved/restored.
SM390 value in high speed interrupt program is overwritten.
4
Forced ON/OFF
High speed X/Y refresh area cannot be
turned ON/OFF forcibly.
In high speed interrupt, forced ON/OFF is not executed and is
ignored.
(Does not result in time-out error.)
5
Monitor condition setting
Cannot be specified within high speed
interrupt program.
Is not executed properly.
(Does not result in time-out error.)
6
Execution time
measurement
Cannot be specified within high speed
interrupt program.
Is not executed and is ignored.
(Does not result in time-out error.)
