Immediate Stop Instruction Executed error

What does 5485 hex mean?

This error (5485 hex) is generated when an MC_ImmediateStop instruction is executed on an axis. This command forces an immediate stop, changing the axis's Status.ErrorStop variable to TRUE, which indicates an error deceleration stopping state. This type of stop bypasses normal deceleration profiles and is typically used for critical or emergency stop conditions.

• Programmatic execution of the MC_ImmediateStop instruction without operator intent or expected conditions.
• Unintended activation of a digital input (e.g., emergency stop button, safety interlock) linked to the MC_ImmediateStop instruction.
• Faulty wiring or electrical noise on a control input that is configured to trigger the MC_ImmediateStop instruction unexpectedly.
• Incorrect parameterization of the StopMode variable within the MC_ImmediateStop instruction leading to an unexpected immediate stop.

Click steps to track your progress.

1. 1

   Review the ladder logic or structured text where the MC_ImmediateStop instruction is called — confirm the conditions under which it is enabled and ensure they are met intentionally.

2. 2

   Inspect all physical emergency stop buttons and safety interlock switches connected to the PLC inputs that could trigger the MC_ImmediateStop instruction — ensure they are not inadvertently activated.

3. 3

   Measure the voltage level at any digital input terminal configured for the immediate stop function (e.g., DI0, DI1) — verify it is at 0VDC (OFF) when an immediate stop is not intended.

4. 4

   Check the StopMode parameter for the MC_ImmediateStop instruction — verify it is set appropriately (e.g., '_mcImmediateStop') for the desired stopping behavior.