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MZ L-Series Manual
Running your controller
Using ‘Slave’ Mode to compensate for a failed
thermocouple
If a thermocouple fails while the controller is working then you may
see different results. A complete fail shows a ‘T/C’ error message
against the actual zone and the actual temperature falls off to
zero. Sometimes it may be intermittent in which case it may show
as uncontrolled temperature deviations for the concerned zone.
Your prime aim is to compensate for this condition and maintain
production until the machine is free and the fault can be repaired.
Slave mode allows you to disregard the particular thermocouple
and slave the faulty zone to work to another zone which is healthy.
This master zone then controls the temperature for the faulty
slaved zone.
1. From Main Menu select Set Menu [5] > Set Zone [1]
2. At the Zone? prompt, enter the number of the zone which has
the failed thermocouple.
3. Use [◄], [►] to select P (probe) or M (Manifold) and press
[ENT].
4. Press the [ENT] button sufficient times until you get the Slave?
Prompt.
5. Enter the number of another healthy zone that is currently
working to the same set temperature as that which you require
for the faulty zone and press [ENT].
Note – ‘Conditions for slaving zones’:
You must select a healthy zone to slave on to. For instance, if
Zone 3 is already slaved to Zone 6 and you now wish to slave
Zone 2, then you might not select Zone 3 as a master zone.
You must choose any other healthy zone, and this includes
Zone 6, which is currently selected as a master zone for Zone
3.
6. The ‘Actual’ column for the slaved zone now shows ‘S n’,
where ‘n’ is the number of the zone that you have slaved to.
Issue 1.3
Mold-Masters®
Page 39