I-7540D CAN-Ethernet Gateway User’s Manual (Version 1.8, March/2021)
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2.4
LED Indication
The I-7540D provides the Converter function between the Ethernet port and
the RS-232 & RS485 & CAN port. It can handle both 11-bits and 29-bits ID format
according to whether it is a CAN 2.0A or 2.0B. It also provides some LEDs to
indicate to users what situation the I-7540D is in.
2.4.1 Power LED
There is a red indicator-LED in the I-7540D as follow:
Firmware is running:
flashing red
The default shipping of I-7540D will be firmware inside, so the red
indicator-LED of I-7540D will be ON 0.5 second then OFF 0.5 second periodically.
2.4.2 CAN bus indicator LED
The I-7540D includes three single-color LED displays to indicate the status of
module, network and I/O device. They are ER LED (it is red), TX LED (it is green),
and RX LED (it is red). The Indicators assist maintenance personnel in quickly
identifying a problem unit. The LED test is to be performed at power–up. When
the CAN communication events occur, these indicators will be triggered to glitter
with different conditions.
ER LED
This LED provides device status and indicates whether or not the device is
operating properly. Table 2-6 shows the conditions of ER status. Therefore, when
the device is operated normally, the ER-LED must be turned off.
If this led flashing
red, users can use the “99S” command, in section 4.5, to read the status of the
I-7540D
.
Table 2-6 ER-LED conditions
Condition
Description
Off
Device is normal; no error occurs
Red
Device has unrecoverable fault
Flashing red Device has recoverable fault.
To recover:
Reset device or perform error recovery