FAQ's: LT3000 Control

FAQ


■Control

	Errors of the main Unit
		Green LED Lamp of Display is blinking.
		Red LED Lamp of Display lights.

	EX module (Specifications)
		How do I connect the EX module to the LT main unit?
		Which I/O devices are connectable?

	EX module (Error)
		An error message is not displayed, but it does not communicate with the EX module.
		Errors displayed when using EX module

	On-Line Monitor/Logic Monitor
		I want to monitor logic programs.
		I want to edit the Logic Program when monitoring.
		I want to set security on the monitor or the online editor of the logic programs.

	Compatible
		Can I convert the LT data and use it?

	Software (Specifications)
		How many timers or counters can I use on one logic program?
		High Speed Counter Input

	Hardware (Error)
		An error code is displayed on the screen.
		The status LED is blinking.
		The status LED is lighting in orange.

	Hardware (Specifications)
		How much capacity of the logic program does the LT main unit have?
		How long is the back-up period?
		Can I replace backlights of the LT3000 series?
		Is the DIO connector attached in the package?
		What are the differences between the LT3000 series and the GP3000 series (Control Class)?
		What feature does the built-in DIO in LT have?
		What types are there in the LT3000 series ?
		How constant is the scan time of the logic program?
		Can I re-write the logic program while it is running?
		How accurate is the internal clock of the main unit?
		Does the LT3000 series conform to CE marking or UL?
		I want to use SSR (Solid State Relay), but how many SSRs can I connect?

	Hardware (System Configuration)
		Can the LT3000 series be connected to external devices such as PLCs, temperature controllers, or inverters?
		What do I need to configure the system of LT3000 Series?
		Connectable I/O

	Internal DIO (Error)
		Error Information

	Variables
		What is Variable?
		How many Symbol Variables can I register?
		How do I set variables?
		What can I do to use the created variables on the screen?
		I would like to keep the data of symbol variables even after the power is turned off.
		What is the difference between #H System Variables and #L System Variables?
		I want to check the size for creating programs.
		Can I delete unused variables in a lump?
		I want to keep symbol variable values after tranferring the project file.

	Ladder Instructions
		What Instructions are there?
		Sample of ON Delay Timer Settings
		Sample of OFF Delay Timer Settings
		Sample of Pulse Timer Settings
		Sample of Up Counter Settings
		Sample of Down Counter Settings
		Sample of Up/Down Counter Settings
		I want to control the fan so that it starts when rising in temperature, and that it stops when falling in temperature. How can I do it?
		How can I take the temperature difference between 2 thermocouples?
		How can I operate the proportional control?
		If an alarm is occurred in the logic program and the circuit of the PID instruction is shut down during the PID control, will control output be turned off (Stop)?

	Creating Logic
		What's the difference between [INIT] and [MAIN] of Logic Screen?
		I would like to create icons of instructions which are used often.
		I would like to display the logic screen and the base screen at the same time.
		Is it possible to use Connection Device Address on Logic Screen?
		How do I register Variables?
		What is Array?
		Is it possible to create Logic Program to operate only once when powering up?
		The sensitivity can be adjusted when controlling the temperature adjusting, but can I adjust the sensitivity with LT?