• Discovery MR750 3.0T System Service Methods
  • 5690009-2EN Revision 4
  • Object ID: 00000018WIA309D9030GYZ
  • Topic ID: id_12373354 Version: 1.3
  • Date: Oct 11, 2021 3:47:43 PM

Read Current/Voltage

Topic ID: id_SL11660609-1061833

Disclaimer

Depending on your service agreement, not all service tools, diagnostics, and utilities referenced in this document may be accessible. Contact your sales person for information on available service license packages.

Topic ID: id_SL11660610-1061833

Diagnostic Description

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Diagnostic Path

Diagnostics > Hardware Location > Pen Panel Cabinet > Shim Supply Diagnostics

Diagnostics > System Function > Magnet > Shim Supply Diagnostics

Topic ID: id_SL2000856-1061833

Purpose

This diagnostic provides a read back of the channels’ present voltage and current.

This diagnostic is comprised of a series of tests that verify and display various shim supply values by communicating from the SCP to the shim supply via the CAN link.

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Components Tested

  • Shim supply

  • Coil channels

  • RTD channels

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Requirements

Software configuration:

  • Standard software

  • CAN communications NOT emulated

Hardware configuration:

  • MGD chassis: SCP and AGP processor boards and bridge board

  • Shim supply, cabling, etc.

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Block Diagram

Figure 1. Shim Supply Block Diagram
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Test Sequence

  1. Set the Test Duration to the number of seconds desired.

  2. Select Read Current/Voltage, then press the Run button.

  3. The diagnostic issues a command that instructs the shim supply to return the present voltage for each coil channel. The diagnostic displays the results.

Note:

The shim supply is first checked to ensure it is in the proper state. Commands to the shim supply are issued via the CAN interface on the SCP.

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Expected Results

An example of diagnostic results is shown in the illustration below. On the actual display, input errors, shim supply state errors, and test condition errors are indicated in red.

Figure 2. Sample of Diagnostic Results
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Finalization

Before scanning, perform a TPS reset.