Table of Contents
Advertisement
A LED test is exercised at power-up, cycling each LED off, green and then red for
approximately 0.25 seconds. At the same time the power-on self test of the device is
performed.
The following table outlines the indicator condition and the corresponding status after
the power-on self-test has been completed:
LED
Power
Link
Status1
Status2
Table 2.1: LED diagnostic codes
Principles of operation
The GCP-MG establishes a communication channel to each GCP-30 and LS 4 unit
connected to the CAN bus. All GCP-30 and LS 4 units transmit multiplexed data values
which the GCP-MG stores in its internal data tables. A GCP-30 for example sends a new
value every 100 ms, a LS 4 every 200 ms.
The GCP-MG acts as a Modbus server on Ethernet and the serial interface. It accepts
connections and Modbus queries from Modbus master devices. The Modbus registers are
then served from the GCP-MG's internal data tables. Because of the data table buffering,
the Modbus can be polled significantly faster than the update rate on the CAN bus.
However faster poll rates would not offer higher update cycles of the data values. The
GCP-MG allows a maximum of 2 connections via Modbus/TCP and in addition one serial
connection via either RS-485 or RS-232.
6
Function
Condition
Off
Power
Green
Off
Ethernet link
Green
Off
Flashing green
1 s rate
Green
Device status
Flashing red
1 s rate
Red
Off
Green
Flashing red-green
Communica-
1 s rate
tion status
Flashing red
1 s rate
Red
Indication
No power applied to the device.
Power supply OK
No Ethernet link
Ethernet link OK
The device has an unrecoverable fault; may need replacing.
Device operational but needs commissioning due to configuration
missing, incomplete or incorrect.
The device is operating in normal condition.
Device operational but has a fault listed which requires acknowledg-
ment.
The device has an unrecoverable fault; may need replacing. Flashing
sequence and rate of Status2 LED indicates fault class.
CAN connection OK, Connection time-out on Modbus
Both Modbus and CAN connection OK
Modbus connection OK, Connection time-out on CAN
Connection time-out on both CAN and Modbus
The device has detected an error that has rendered it incapable of
communicating on CAN.
UMGCPMG-2201
Advertisement
Table of Contents
