IDEC MICRO/I HG4G-CJT22 F-B Series, User Manual, Page: 1500 / 1665

1 External Memory Devices
31-14
WindO/I-NV4 User’s Manual
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External memory device writing timing
If the write timing setting for Alarm Log, Data Log, and Operation Log data is set to Real Time , the data is stored in
the file output buffer once.
The writing timing from the file output buffer to the external memory device is as follows.
• Within 3 minutes of an output event to the external memory device.
• When the HMI Special Relay LSM20 for SD memory card or the HMI Special Relay LSM18 for USB flash drive or
changes to 1.
• When switching to the System Mode.
• When downloading/uploading project data.
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SD memory card access status
Models HG5G/4G/3G/2G-V, HG4G/3G, HG2G-5F have an SD Memory Card Access Lamp (LED).
The SD Memory Card Access Lamp (LED) indicates the access status to the SD memory card. This status can also be
read by monitoring HMI Special Internal Relay LSM21.
The SD Memory Card Access Lamp states and status descriptions of the HMI Special Internal Relay LSM21 are as
follows.
SD Memory Card Access Lamp states
In the following events, MICRO/I writes the data in the file output buffer to the external memory device
once, and then moves on to the next process. This creates a processing delay which can cause WindO/I-
NV4 to raise a communication error when downloading or uploading a project. If a communication error
occurs, try downloading or uploading the project again.
• When data exists in the file output buffer
• When attempting to switch to the System Mode while reading/writing to the external memory device.
• When downloading or uploading project data.
SD memory
card access
status
SD Memory
Card Access
Lamp state
LSM21
state
Status generation conditions Operation
Read/write access
stopped
OFF 0
No SD memory card is inserted.
The inserted SD memory card is not supported.
The inserted SD memory card is unformatted.
The SD
memory card
can be
removed.
Recognizing SD
memory card
Slow blink
(ON/OFF every
0.5 seconds)
0
When an SD memory card is inserted.
When the power is switched ON with an SD memory
card inserted (slow blink -> ON).
Read/write access
standing by.
1
When HMI Special Internal Relay LSM20 changes to 1.
(slow blink -> OFF)
Do not remove
the SD
memory card.
Read/write in
progress
Rapid blink
(ON/OFF every
0.2 seconds)
1
Reading/writing data to the inserted SD memory card.
(Note, the LED stays lit when reading or writing to the
SD memory card while using the project transfer
function, or waiting for the operating mode to
change.)
Standby ON 1
A usable SD memory card is inserted and can be read
or written to.
HG3G HG2G-5F HG5G-V HG4G-V HG3G-V HG2G-V HG2G-5T HG4G HG1G HG1P
Operation State
At power up
OFF -> slow blink -> Lit
SD memory card is inserted.
HMI Special Internal Relay LSM20 changed to 1. Lit -> slow blink -> OFF
Data is read/written to the SD memory card
(screenshot data, etc.)
Lit -> rapid blink -> Lit (reading/writing completed)