Startup and operation
Page 28
RES-440
Version 1
3.
"Active if Tact = Tset", with latch function
(as of software revision 100)
Relay K1 is closed if the actual value is inside the specified temperature tolerance band (steps 207, 208). If the
actual temperature leaves the tolerance band once while the "START" signal is active, relay K1 is opened. The
relay is not closed again until the next "START" signal is activated. The switching state of relay K1 can thus
also be interrogated by the higher-level PLC after a heatsealing process (latch function, see graph below).
Other settings are available in this menu when time control (timer function) is active. They are described in
section 10.23.7 "Relay K1 (with time control)" on page 70.
9.3.9
“Output 1“/ “Temperature OK“ signal (without time control)
On controllers up to software revision 027, the switching output at terminals 20+21 was called
"Temperature OK". The more general name "Output 1" is used as of software revision 100 because
this output now also supports other functions.
The "Output 1" signal is available at terminals 20+21 as a digital control signal.
Up to software revision 027:
The RES-440 checks whether the ACTUAL temperature is inside a specifiable tolerance band ("OK" window) on
either side of the SET temperature. The lower (
) and upper (
) limits of the tolerance band can be
changed independently of one another by means of steps 24+25 in the Configuration menu.
If the actual temperature is inside the specified tolerance band, the output signal at terminals 20+21 is switched
(see graph below):
Set
NO contact of
Set+
Δϑ
lower
Set+
Δϑ
upper
Actual value
Time
Time
Open
Closed
Relay K1
!
RES-440
+24VDC
21
I
max
50mA
20
GND
GND
Δϑ
lower
Δϑ
upper
