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No scan time can be guaranteed when a program is
being uploaded.
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No scan time can be guaranteed when a CF card is
being read.
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When an error arises in the logic or the I/O
driver, the scan time is delayed by approximately 10ms.
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When many devices are connected to the network,
the scan time may be delayed.
It is recommended to physically separate the network into a control
network, an information network, and others if necessary.
To be more specific, configure a PC with two network cards and
configure the control network that includes the AGP on one card and
configure the information network on the other. In other words,
separate the network into two groups on the PC.
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When movies are recorded/played using the
multimedia function while the logic is in use, movie
recording/playback may stop.
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Please note that data updates between a
device/PLC and the logic program are not synchronized when the
device/PLC address (excluding internal addresses) is used in the
logic program.
The data value is sometimes undefined when the logic program
starts, and is not updated until communication with the device/PLC
is established. Check that the device/PLC address data has been
updated before using it in the logic program.
For example, a special relay (always on) is used for a
device/PLC.
Connection Device: Special relay (always on)
Logic program: Use the special relay in the logic program and check
that the special relay is on before using the device/PLC address.
If there are several devices/PLCs, a different relay is required
for each device.
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For logic programs, you cannot use disabled
addresses to read devices/PLC. For unreadable addresses, refer to
the "GP-Pro EX Device Connection Manual".
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If the same address (except for variables) is
specified as a word address and as a bit address and used in
multiple instructions, data between the word and bit specified
addresses may be different in the same scan.
For example, the NO instruction [PLC1]D0000.00 will not show
the data set in the MOV instruction [PLC1]D0000. Even if "1" is
written in the variable "Data", the change is shown on
[PLC1]D0000.00 only after a few scans.
to avoid this problem, do the following.
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Specify bits after moving data from the address
to a variable (rung 2)
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When updating data on the device/PLC as a result
of the logic program, make sure you use the MOV instruction (rung
5)
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If the logic program includes operations for
writing to the device/PLC address, the following phenomenon may
occur, depending on the communication speed and the number of
device/PLC addresses to write to :
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When the display unit starts up, parts set up
with the device/PLC address do not display.
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Change screen operations take extra time.
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Writing to the device/PLC fails.
This occurs due to excess write operations
from the logic program to the device/PLC.
To avoid this problem, do the following: Increase the transmission
speed with the device/PLC.
