Teach-In - JUMO 709061/8-01-032 Operating Manual

6.1.1 Teach-In

"Manual"
teach-in
H
H
Teach-in
"Automatically
(once)"
V1.04/EN/00561071 [Thyristor Power Switch TYA 201]
Depending on the configuration of the parameter "Load monit. Teach-In",
Teach-In (i.e. determination of the load measured values in the OK state) is ei-
ther performed once automatically after power ON or automatically and cycli-
cally, repeatedly every minute, or manually.
For "Manual Teach-In", the power controller must be told once after the oper-
ating point has been reached that it is now to perform the Teach-In.
This can be performed in the operating level or in manual mode.
v Chapter 4.2.4 "Monitoring"
v Chapter 6.2.2 "Configuring Teach-In (prerequisite for Teach-In in manual
mode)"
In this variant of Teach-In, the Teach-In values are then permanently saved.
Teach-In does not need to be performed again when the power controller is
switched off and on again.
Teach-In can be repeated whenever necessary. The old Teach-In values are
then overwritten by the new ones.
The Teach-In values are only deleted if the load monitoring Teach-In parameter
is explicitly configured to "Manual Teach-In" or when the default setting is ap-
plied. Teach-In is not affected when other parameters are reconfigured.
From software version 256.01.08, the determined Teach-In values are also
transferred when the setup data of one power controller is transferred to an-
other.
If "Manual Teach-In" has been configured but no Teach-In has been conduct-
ed, the message "Teach-In load monitoring!" appears on the display as a re-
minder.Manual Teach-In can only be performed on the device itself, not via the
setup program.
To ensure that the load ratios are recorded precisely for later operation, only
perform the Teach-In process at a load current of at least 20 % of the rated
value!
"Automatically once" means that the Teach-In values are temporarily saved af-
ter each power ON.
This setting is suitable only for heating elements with a temperature coefficient
TC ≈ 1.
When the power controller is disconnected from the mains voltage, the Teach-
In values are deleted again. After another power ON, load monitoring therefore
remains inactive until a new Teach-In process is performed.To ensure that the
load ratios for are recorded precisely for later operation, Teach-In is only per-
formed in phase-angle operation mode with at least 30 % of the output level.
(In burst-firing operation mode, this restriction is not needed because a suffi-
ciently high current always flows when the thyristor is fired. In this case,
Teach-In is always performed shortly after a power ON or – if configured – after
the completion of the soft start.)
6 Special device functions
79