Honeywell DR4300 Resetting the Limit Controller Introduction, Limit controller operator interface

Configuration, Startup, and Operation of Recorder with Display

4.5.2.8 Resetting the Limit Controller

Introduction

The DR4300 is available as a limit controller. On each pen channel’s printed circuit assembly Relay 1 is used for limit control. When the recorder detects that the input has exceeded the limit (or fallen below the limit, depending on how the unit is configured) the controller goes to the limit state: Relay 1 is

de-energized.

Limit controller operator interface

The operator interface on a limit controller is the same as that of other models having a display and keypad. The MAN/AUTO/RESET key functions as a reset only. Manual and Auto mode do not apply to the limit controller.

When the recorder’s controller goes to the limit state (relay de-energized), the operator will be alerted to the limit state by a message on the bottom line of the display.

•If the input that triggered the limit state is on the pen channel being displayed, the message will be “LIMIT”.

•If the input that triggered the limit state is on the other pen channel, the message will be “Pn ERR” (where n is the limit state’s pen channel). Pressing the “FUNC” key to switch channels will display the “LIMIT” message.

Reset procedure

Follow the procedure in Table 4-35to reset the limit controller (take it out of the limit state).

		Table 4-35 Procedure for Resetting Limit Controller
Step	Press		Action
1			Correct the cause of the limit state.
2			Select the desired input (indicator INP 1 or INP 2).
	FUNC
3			Press the RESET key.* The limit controller will resume normal operation,
	MAN
	AUTO		monitoring the value of the input and comparing it to the configured limit value.
	RESET

*This refers to the MAN/AUTO/RESET key on the keypad, NOT the reset switch SW2 on the printed circuit assembly for the pen channel.

The Limit Controller may also be reset remotely; see XRSET function in Subsection 4.3.22. Output LED is on when relay is energized (not in limit).

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