EPRO module MMS6210 Emerson A6110 6110 A6120 in stock

Description

During A6120 redundant LVT operation, only one software PI is executed. The output

voltage is written to both DACs. Therefore, there are four identical servo output

voltages. By connecting one coil to channel 1 and the A6120 other to channel 2, you can

take advantage of duplicate DAC and output driver hardware

1. In order to set up the Servo Driver for redundant LVT operation, enter the

command

RDNDNT=1

2. Save the confifiguration flflag to EEPROM by using the command

SC <return>

3. Once the wires are hooked up properly, calculate the valve by typing

CALFULL <return>

During the calibration, the channel undergoing calibration is indicated on the

terminal screen.

Calibrating redundant LVTs on the Serve Driver is diffificult because improper setup

can create a situation where the feedbacks A6120 from the LVTs indicate that the valve

should be moved in the opposite direction. Then, during the calibration sequence,

the valve will not move to the endpoint properly and record valid data. Another

complicating factor is that in the redundant confifiguration, the position feedbacks

are high-selected.

The servo driver is a two-channel Controller. Each channel is calibrated

independently. The channel to be calibrated is selected by typing

V1 to select valve 1

OR

V2 to select valve 2.

During the calibration, all the printed messages will indicate the valve number.

Once all the wiring is properly connected, it is possible to calibrate the Servo Driver

with the redundant flflag set to 1. In this situation, the A6120 channel not being calibrated

will simply follow along with the channel under calibration.

For initial calibration, after an overhaul, or for a new installation, it is recommended

that you clear the redundant flflag and calibrate each LVT independently. During this

process only one servo coil would be connected because the independent channels

will “fifight” each other. The calibration process follows:

1. Clear the redundant flflag by typing RDNDNT=0<return>, then save the setting

to EEPROM.

2. Disconnect the second servo coil, leaving one servo coil connected to channel 1.Servo Driver
3. Calibrate channel 1.
4. Disconnect the servo coil connected to channel 1.
5. Connect the other servo coil to channel 2 servo coil output.
6. Calibrate channel 2.
7. Connect servo coil to channel 1.
8. Set the redundant flflag and save setting to EEPROM.

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