JUMO 709061 TYA 201 - Single-Phase Power Controller Operating Manual - Manual (Page 73)

2012-12-01/00561071 [SCR Power Controller TYA201] 71
6 Special device functions
6.1.1 Teach-in
Depending on the configuration of the parameter "Load monit. teach-in",
teach-in, i.e. determination of the load measured values in the OK status, is ei-
ther performed once automatically after power ON or automatically and cycli-
cally, repeatedly every minute or manually.
"Manual"
teach-in 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 is possible in the operator level or in manual mode.
v Chapter 4.2.4 "Monitoring"
v Chapter 6.2.2 "Configuring the teach-in (prerequisite for teach-in in manu-
al mode)"
The teach-in values are then permanently saved. It is not necessary to perform
the teach-in again when the power controller is switched off and on again.
The 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 factory setting is ap-
plied. The teach-in is not affected by reconfiguration of other parameters.
If "Manual teach-in" has been configured but no teach-in has been conducted,
the message "Teach-in load monitoring!" appears on the display as a remind-
er.
Manual teach-in can only be performed on the device itself, not via the setup
program.
Teach-in
"Automatically
(once)" "Automatically (once)" means that the teach-in values are temporarily saved
after each power ON. This setting is only suitable for heating elements with a
temperature coefficient of TC
∪
1.
They are deleted again when the power controller is disconnected from the
supply voltage. When the power is switched on again, the load monitoring
function is inactive until the new teach-in has been performed.
To ensure that the load ratios for later operation are recorded precisely, the
teach-in in phase angle control is not performed until the output level has
reached at least 30 %. (This constraint is not necessary for burst-firing mode
as the current of a fired SCR power controller is always high enough. In this
case, the teach-in is always performed shortly after power ON or – if config-
ured – after completion of the soft start.)
H
From software version 256.01.08, the determined teach-in values are also
transferred when the set-up data of one power controller is transferred to an-
other.
H
To ensure that the load ratios for later operation are recorded precisely, only
perform the teach-in at a load current of at least 20 % of the rated value.