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Note that a 3720 ACM meter with an ISOCOM2 card has both the PML and Modbus protocols available. Switching between protocols is done from the 3720 ACM meters front panel.
3710 communications Modbus PML ISOCOM
In order to determine which protocol was installed on your 3710 ACM meter's ISOCOM communications card, you must check the firmware using the meters front panel:
1) Hold down the 'Parameter Select' and 'Cursor' buttons together until the display reads 'Programming Mode'.
2) Press 'Parameter Select' until you get to 'Diagnostics', then press 'Increment'. 'Yes' appears on the display.
3) Press 'Parameter Select' again to display the meters firmware version.
If there is an 'M' in the firmware version, then the meter is communicating with the Modbus protocol.
If there is no 'M', then the meter is communicating with the PML protocol.
Last Revised: 2008-Jan-08
All content © 1992-2008 Schneider Electric
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