550 542 04


PD 601x DPI with RS232 Interface


Specific Features

A PD 601 DPI is used to provide local programmable intelligence for the local cluster connected via Light-Link P-NET, and to provide an interface with MODEMs, PCs or other serial equipment, such as printers, bar code readers etc. It uses the BM 003 or BM 011 base module.


Communication interfaces

The PD 601 has 2 standard P-NET Communication Channels.


In the PD 601 DPI, Channel 1 is a P-NET RS232 communication channel, primarily for communicating with MODEMs or PCs, but also with other serial devices such as bar code readers and printers.


Channel 2 is a P-NET Light-Link communication channel intended for communicating with other locally mounted P-NET devices using the optical Light-Link interface.

See General Distributed Process Intelligence information for a general description of the DPI family.



The PD 601 is programmed in Process-Pascal, which is an extension of standard Pascal, allowing easy declaration and utilisation of P-NET variables and objects. Programs are developed and compiled on a standard PC, then downloaded directly via a P-NET interface. Program code can be downloaded to FLASH memory.


The PD 601 DPI devices have the channels shown in the following table.


Channel No.

Channel name

Channel description



Service channel



Comm. channel, RS232, P-NET mode or Data mode



Comm. channel, Light-Link, P-NET mode or Data mode



Channel for holding application licences (available in DPIs with operating system version 1.15 or higher)



Program channel for operating system



Program channel for Process-Pascal


See Variables outside channels



The PD 601 DPI is available with 4 different memory versions: Small, Medium, Medium+ and Large. The amount and type of memory for each version is shown in the table.



RAM *)

Program FLASH


PD 601 S

64 Kbytes

64 Kbytes

128 Kbytes

PD 601 M

480 Kbytes

512 Kbytes

1024 Kbytes

PD 601 M+

992 Kbytes

512 Kbytes

1024 Kbytes

PD 601 L

480 Kbytes

1024 Kbytes

2048 Kbytes

*) 2 Kbytes of RAM reserved for system variables.


Memory details, Backup battery, LED indicators and real time Clock


PD 601 Block Schematic

The following figure provides a block diagram showing the internal structure of a PD 601 DPI.



VIGO Licence

When the FLASH operating system is running in the PD 601, it can give licence to run VIGO version 5.3 or higher on a PC connected directly to the PD 601 via the RS232 interface.


Electrical Specifications


Mechanical Details



Related topics

Ordering Information

Wiring diagrams

RS232 connection

Base module overview

PD 600x DPI with RS485 Interface

PD 602x DPI with Ethernet LAN Interface

RS232 Communication Channel

Light-Link Communication Channel

Licence Channel

Memory, backup battery, LED, RTC

Programming DPIs

DPI Program Channel

DPI Variables Outside Channels

DPI State Diagram

Data acquisition