TMR_FNCT: Pulse and delay

The TMR_FNCT (FB400) block processes pulse signals.

The function block is used for:

Time delays and pulses (with the aid of an input signal). The cycle generator CYCLEGEN (FB401) block can be used for pulses without start condition.
Switch-on and switch-off delays, minimum runtimes, minimum breaks for an aggregate (by combining several TMR_FNCTs).

Functionality

One of the following functions is active as per the set timer mode [TiMod].

TiMod	Process
...	In general, a change to the input value [In] starts the delay time or pulse length. Upon [Reset], all started times are reset and output [Out] is reset.
Pulse	Limit pulse length The pulse at input [In] is shortened to the maximum possible pulse length [Ti]. A pulse [Reset] resets the output immediately to [Out] = 0 (Off).
ExpPulse	Constant pulse length The pulse at input [In] is extended or shortened to the constant pulse length [Ti]. A pulse [Reset] resets the output immediately to [Out] = 0 (Off).
SWOnDly	Switch-on delay The pulse at input [In] is switched only after delay time [Ti] to output [Out]. Pulse shorter than [Ti] are ineffective. A pulse [Reset] resets the output immediately to [Out] = 0 (Off).
StoSWOn	Saving switch-on delay The pulse at input [In] switches output [Out] constantly to 'On' after delay time [Ti]. A pulse [Reset] resets the output to [Out] = 0 (Off).
SWOffDly	Pulse extension The pulse at input [In] is extended by the delay time [Ti]. A pulse [Reset] resets the output immediately to [Out] = 0 (Off).

Reset

Upon [Reset], all started times are reset and output [Out] is reset.

If [Reset] and [In] appear at the same time, reset takes priority. If the start condition reappears during the timer's runtime, the time restarts.

Inputs

Pin	E	Description
In	pa	Input.
Ti	pa	Time. Delay time or pulse length. Changes to the runtime become effective immediately.
		0ms	No delay time or pulse length.
		...	Delay time or pulse length.
TiMod	p	Timer mode. Upon a change of timer mode, an internal reset is carried out prior to performing the block's functionality.
		1 (Pulse)	Pulse Limits the pulse length.
		2 (Expanded pulse)	Constant pulse length. Harmonizes pulse length (constant length).
		3 (Switch On delay)	Switch-on delay. Delays switch-on and shortens the pulse length.
		4 (Stored switch On)	Switch-on delay with saving property. Delays switch-on and switches off only by [Reset].
		5 (Switch Off delay)	Pulse extension. Extends the pulse length.
Reset	p	Reset.
ResetTi	p	Reset times

Outputs

Pin

Description

Out

Output.

TiEld

Elapsed time.

The time expired to date is pending. After reaching Ti, TiEld is reset to zero.

Input values

Pin	Description	Data type	Default value	E.g. Engineering unit or Text group	Min.	Max.
In	Input.	Boolean	0 (No)	No, Yes
Ti	Time.	Time	1m_40s	T#0d_0h_0m_0s_0ms
TiMod	Timer mode.	Multistate	2 (Expanded pulse)	Timer mode	Pulse	Pulse extension
Reset	Reset.	Boolean	0 (No)	No, Yes
ResetTi	Reset times	Boolean	0 (No)	No, Yes

Output values

Pin	Description	Data type	Default value	E.g. Engineering unit or Text group	Min.	Max.
Out	Output.	Boolean	0 (Off)	Off, On
TiEld	Elapsed time.	Time	0ms	T#0d_0h_0m_0s_0ms

Application

Application examples for individual operating modes:

Operating mode pulse:

The damper function is monitored by ensuring that it reaches the end position within a specified time after startup.

Operating mode extended pulse:

Stairwell automation switches on the light for a specific time via button.

Operating mode for switch-on delay:

A presence detector switches on ventilation only after a specific time after entering the room.

Operating mode for switch-off delay:

A bathroom exhaust switches off only after a specified time after the light is switched off.

Process response

Troubleshooting