Allen Bradley | MicroLogix 1000

The Allen-Bradley MicroLogix 1000 Programmable Logic Controllers (PLC) are compact, High-speed controllers that supports advanced instruction sets and offers flexible communication options. This controller family is ideal for use in industrial applications such as Factory and Process automation requirements. This controller family features an integrated power supply, RS232 communication port, embedded discrete input and outputs with other controller provided with embedded analog input and output channels that support analog voltage and current signals.

The MicroLogix 1000 controller family is programmed using RSLogix 500 or RSLogix Micro programming software. With this programming software, this controller complies with IEC61131-3 as it supports Ladder Programming Language. Aside from this windows based programming software packages, MicroLogix 1000 Controllers may also be configured and programmed using Hand-Held Programmer (HHP) which supports addition of a memory module for mobile and convenient access to the controller’s user program.

MicroLogix 1000 models include support for AC and DC power supply inputs while controllers include a 10, 16, 32-Point Discrete controllers. Controllers with analog capability feature an embedded 20 Discreet Input and Output channels with 4 analog inputs configurable for voltage and current and an Analog output that may be set for either Voltage and Current output as well. Controller models that are powered by 24VDC power supply have built-in High- Speed input for use in applications that require counting, totalizing and simple motion applications. MicroLogix 1000 product family also offers a variety of controller with input channels capable of sourcing and sinking configuration and individual commons to provide channel isolation.

MicroLogix 1000 controllers are provided with minimum of 1KB memory that is comprised of approximately 737 instruction words and 437 data words. It has an integrated Electrically Erasable Programmable Read-Only Memory (EEPROM) that is designed to store user program. This is one advantage of this controller family as it does not require a battery to retain the user program. This feature ensures that program deletion may not be caused by a drained battery. The integrated RS232 communication port is a 8-Pin mini DIN port that supports a variety of protocols such as MODBUS RTU slave and DF1 protocol. It may also be used to connect to DH485 communication network with the use of 1761-NET-AIC to enable Peer-to-Peer messaging of up to 32 controllers where data and logic status can be directly exchanged. This is also known as inter-controller communication. DeviceNet and Ethernet protocol is also supported by the integral RS232 port with the use of 1761-NET-DNI and 1761-NET-ENI or 1761-NET-ENIW respectively.

Primary connection to programming workstation is made using RS232 configured as DF1 protocol. This same protocol may also be used to communicate with Human Machine Interfaces (HMI) or Supervisory Control and Data Acquisition (SCADA), gateways, converters and 3rd party products. If configured as MODBUS RTU slave, it may be connected to up to 254 slave nodes. Integral data elements of MicroLogix 1000 controllers include 512 internal bits, 40 timers, 32 counters, 16 control files, 105 integer files, 33 diagnostic status and throughput of 1.5 ms, for a typical 500-instruction program.