Delta HES Series Instructions For Use Manual page 51

For firmware version 2.03 and above, set the Parameter 01-01=2

Source of operation command
Setting value 0: Operation by using the digital keypad
of Pr. 01-01 1: Operation by using the external terminals. The Stop button on the
keypad is disabled.
2: Communication using RS-485. The Stop button on the keypad is
disabled
Set the Parameter 03-15 = 1

Source of Frequency Command
Setting value 0: Digital Operation Panel
of Pr. 03-15 1: RS485 Communication
2~5: reserved
Shut down the power and then supply the power again

Set an arbitrary value of the frequency command at the Master to check if the Slave has the
same value of the frequency command
Set 10rpm at the Master and then press RUN to see if the Slave is also running. If not,
check the wiring or the parameter setting for any problem
Set the Slave Parameter 03-13 = 2

Confluence Master/Slave Selection
Setting value 0: No function
of Pr. 03-13 1: Master 1
2: Slave/Master 2
3: Slave/Master 3
For firmware version 2.03 and above, the Parameter 03-21 can be set at the Slave to

decide if the Salve is performing the reversed operation for depressurization.
Note: If it is required to reverse the operation for depressurization at the Slave, it is
necessary to make sure that the pump outlet port is not installed with a check valve and the
Parameter 03-16 should be set as 500%
Slave reverse operation for depressurization
Setting value 0: Disable
of Pr.03-21 1: Enable
Limit for the Slave reverse depressurization torque
Setting value 0~500%
of Pr. 03-16
Chapter 3 Flow of machine AdjustmentHES Series
3-13