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5.4.3 Heater disconnection detection wiring and setting example
for three-phase heater
The following figure shows a wiring and setting example to detect a three-phase heater disconnection by using the
heater disconnection detection function.
Three-phase heater disconnection detection is executed by measuring the currents of two of the three cables.
In the above wiring example, set CT CT input channel assignment setting (Un\G264 to Un\G271) as indicated below.
CT input Buffer memory address Set value
CT1 Un\G264 1
CT2 Un\G265 1
CT3 Un\G266 2
CT4 Un\G267 2
CT5 Un\G268 3
CT6 Un\G269 4
CT7 Un\G270 0
CT8 Un\G271 0
Q64TCTTBWN
Q64TCRTBWN
L1
L2
L3
L4
COM-
CH1
CH2
CH3
CH4
CT1
CT2
CT1
CT2
CT3
CT3
CT4
CT4
CT5
CT5
CT6
CT6
CT7
CT7
CT8
CT8
To three-phase heater (used in CH2 loop)
To single-phase heater (used in CH3 loop)
To single-phase heater (used in CH4 loop)
Unused
Controlled
object