Eliminate MRS Drive.pdf

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MELDAS MRS Series

How To Eliminate MRS Servos

From The Control System

USA-E99981 -003*

MITSUBISHI ELECTRIC AUTOMATION

USA

List of Past Revisions

Suffix

Date of Revision

3/5/97

Detail

First edition created

The following information will allow you to regain a ready condition on a machine

regardless of a servo or spindle alarm, which may be causing a not ready condition.

Lets say you have a milling machine whose x axis is generating an alarm 16 at power up,

but you need to rotate the spindle. Perform the following steps to take the x axis servo

amp out of the MCU control system.

TECHNIQUE # 1

1. Power down the entire machine.

2. Set the rotary pot on the drive to “F”

3. Locate the switch block that consists of

ONLY 4

dip switches. See below.

This block can be found in the following places:

V series control:

Non V series :

On the inside of the MCU: MC161, MC161-1

On the inside of the MCU: MC611, MC616, MC617

In the case where the MCU is a MC632 or MC631, there are no dip switches.

Instead, set the jumper labeled “S5” on the MCU.

NOTE:

Setting dip switch 4 or jumper S5 puts the NC into a test mode and should bypass

the “amp unequipped” alarm. Also, the measures described above for MRS may only

work for the MRS11 & 12 series and not the MRS1, 2, & 3 because of software.

TECHNIQUE # 2

This test can be used to determine if a MR-S amplifier, in a daisy chain, is the cause of a

data transfer error or some sort of a communication error.

1. Power off the NC control and main power.

2. Locate the four switch dip switch block on the NC’s MCU card.

3. Set dip switch four to on.

4. Pull the cam11 cable out of the MCU and put the terminator plug into its place.

5. Power on the NC and machine.

6. If NC side is ok (MCU, CPU, etc..) the machine should come up ready.

7. To test out the amps, one by one bring the terminator plug to each amp along with the

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