Instructions

Introduction
akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany Tel.: [phone] · www.akytec.de
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Introduction
This manual describes the functions, configuration, operating instructions, programming and
troubleshooting of the multifunctional programmable relay PR200 (hereinafter referred to as
PR200, device, or relay).
Terms and abbreviations
ALP – programming software akYtec ALP for programming PR series relays, based on
Function Block Diagram (FBD) programming language
ADC – analog-digital converter
DAC – digital-analog converter
Display element – program element used to display information on the device display
Modbus – application layer messaging protocol for client/server communication between
devices connected on different types of buses or networks, originally published by
Modicon (now Schneider Electric), currently supported by an independent organization
Modbus-IDA (www.modbus.org).
Project – user application created in ALP software that also includes the device
configuration
RAM – random access memory, volatile part of the device memory
Retain memory – non-volatile device memory for retain variables
Retain variable – type of variable that keeps its value after device restart (power off/on
cycle)
ROM – read-only memory, non-volatile part of the device memory
Symbols and key words
DANGER
DANGER indicates an imminent dangerous situation that will result in death or serious
injuries if not prevented.
WARNING
WARNING indicates a potentially dangerous situation that could result in death or serious
injuries.
CAUTION
CAUTION indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
NOTICE indicates a potentially dangerous situation that could result in damage to
property.
NOTE
NOTE indicates helpful tips and recommendations, as well as information for efficient and
trouble-free operation.