Modbus Tcp (License Required); Modbus Tcp Configuration; Licensing; Configuration - GE Digital Energy 1018959 Operating Manual

7

MODBUS TCP (LICENSE REQUIRED)

The SNMP/Web adapters embed a Modbus TCP Slave implementation, offering the following features:
•
UPS alarm monitoring
•
UPS status monitoring (3-ph version only)
•
Input /Output / Bypass / Battery measurement monitoring
•
Monitoring ONLY interface – the Modbus interface does not provide any control option
For 3-ph parallel systems, it is possible to monitor each single UPS and obtain similar information for the
parallel system as a whole.
NOTE: A License Key is needed to activate the Modbus TCP functionality on the SNMP/Web adapters.
Please contact your local GE distributor to obtain a valid License Key.
7.1

MODBUS TCP CONFIGURATION

7.1.1 Licensing

As stated, a License Key is needed to activate the Modbus TCP functionality. Once a valid License Key is
obtained, it shall be entered into the SNMP/Web adapter using the console interface, either local (serial
connection) or remote (Telnet, SSH).
The License Key comes in a GUID format (e.g. xxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx). To enter the License
Key, type in the modbus_key command followed by the License Key. See the following example:
GEDE> modbus_key CECFD05B-750E-FF51-2E2F-3848772E6842
Key accepted, Modbus TCP authorised
Enter 'nvsave' cmd to save the configuration
It is recommended to promptly save the configuration. If the configuration is not saved, at reboot the
adapter will revert to the last saved configuration and Modbus TCP will be disabled – to re-enable, enter
the License Key once again.
Once a valid License Key is entered the Modbus TCP functionality is unlocked and all applicable console
commands and web pages will be made available to the user.
NOTE: The License Key is linked to the SNMP/Web adapter MAC address – make sure you are using the
right License Key for your adapter.

7.1.2 Configuration

Once a valid License Key has been entered, the Modbus TCP slave can be configured. The configuration
can be accomplished via the console interface, and even more easily by using the web interface (System
section). The following parameters will be controlling the Modbus TCP slave operation:
•
Modbus TCP Enable
The Modbus TCP service can be disabled, in which case the applicable TCP port will be closed.
•
Modbus TCP Port
This configures the TCP Port on which the Modbus Slave will be listening.
The default port for Modbus TCP is 502.
•
Modbus Slave Id
With Modbus TCP there is no real need to identify the Modbus slaves with specific IDs, as the IP
address will force the selection. However it is possible to configure the Slave Id when needed.
The other option is to force a value of 255 – this disables any slave address check, and all
requests are accepted.
Modifications reserved
OPM_CNT_SNM_BAS_CRD_1GB_V014.doc
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Operating Manual SNMP/Web Adapter