2.2.8 Mode selection
The setup for regulation mode has been changed and works differently in PPU-3. In the PPU-2 system, the
selection of running modes is a combination of digital inputs, see the table below. In the PPU-3 system, the
four different modes can be configured in the utility software - I/O settings.
PPU-2
Description
PPU-3
Digital input
(48)
Digital input
(49)
Active mode
Input
OFF
OFF
Fixed frequency
Digital input (configura-
ble)
ON
OFF
Fixed power
Digital input (configura-
ble)
OFF
ON
Droop
Digital input (configura-
ble)
ON
ON
Load sharing
Digital input (configura-
ble)
Mode 4
(51)
Mode 5
(52)
AVR mode
Input
OFF
OFF
Fixed voltage
ON
ON
OFF
Fixed Q
ON
OFF
ON
Fixed PF
ON
ON
ON
Q load sharing
ON
Voltage droop
ON
For description of the complete mode setup, refer to the Designer's Reference Handbook.
2.2.9 External communication - Modbus
The functions and readings on Modbus addresses are not the same from a PPU-2 and a PPU-3 controller.
Parameter 7514 allows to enable PPU-2 Modbus addresses in a PPU-3 controller and has three different set-
tings:
1. Standard: Normal PPU-3 register layout.
2. GPU/PPU-2: GPU/PPU-2 register layout. Only GPU/PPU-2 registers will respond, requests to any other
register will result in "ILLEGAL DATA ADDRESS".
3. MIX: GPU/PPU-2 register layout. Requests to GPU/PPU-3 registers that are not occupied by GPU/PPU-2
will respond as in "Standard" mode.
This only applies to the external communication board (options H2 and H3) located in slot #2. The USB serv-
ice port and Ethernet port (option N) still use the PPU-3 Modbus address list.
Contact DEIF Support for a complete list of available parameters.
2.2.10 M-Logic in PPU-3
The M-Logic functionality is included in the PPU-3 unit and is not an option-dependent function.
M-Logic is used to execute different commands at predefined conditions. M-Logic is not a PLC, but substi-
tutes one if only very simple commands are needed.
ML-2 application notes Converting PPU-2
to PPU-3 4189341126 UK
Application and installation
DEIF A/S
Page 17 of 18
