Group 81: Pfa Control - Daikin MD5 Operation Manual

Variable frequency drive controller

Hide thumbs

Table Of Contents

Table of Contents

Group 81: PFA Control

Table 22: Group 81: PFA Control

Code

Description

8120

INTERLOCKS

Defines operation of the Interlock function. When the Interlock function is enabled:

• An interlock is active when its command signal is absent .

• An interlock is inactive when its command signal is present .

• The MD5 will not start if a start command occurs when the speed regulated motor's interlock is active – the control panel displays an alarm .

Wire each Interlock circuit as follows:

• Wire a contact of the motor's On/Off switch to the Interlock circuit – the drive's PFA logic can then recognize that the motor is switched off and start the

next available motor .

• Wire a contact of the motor thermal relay (or other protective device in the motor circuit) to the Interlock input – the drive's PFA logic can then recognize

that a motor fault is activated and stop the motor .

0 = NOT SEL – Disables the Interlock function . All digital inputs are available for other purposes .

• Requires 8118 AUTOCHNG INTERV = 0 .0 (The Autochange function must be disabled if Interlock function is disabled .)

1 = DI1 – Enables the Interlock function and assigns a digital input (starting with DI1) to the interlock signal for each PFA relay . These assignments are

defined in the following table and depend on:

• the number of PFA relays [number of parameters 1401...1403 and 1410...1412 with value = 31 (PFA)]

• the Autochange function status (disabled if 8118 AUTOCHNG INTERV = 0 .0, and otherwise enabled) .

No . PFA relays

Autochange disabled (P 8118)

DI1: Speed Reg Motor

DI2...DI6: Free

DI1: Speed Reg Motor

DI2: First PFA Relay

DI3...DI6: Free

DI1: Speed Reg Motor

DI2: First PFA Relay