AH Motion Controller – Operation Manual 5.1. Introduction The chapter introduces the concept of common devices which will be used thoughout the programming process. In addition to the common devices, to complete a more complicated program you may also need to use other elements such as symbols, enumerations which are also introduced in this chapter. For motion control programming, there are also specific motion control devices which can be used for setting motion axis parameters. As long as you equipped yourself with the knowlege of devices and symbols, you are ready to use instructions for programming.
For detailed information of instructions, refer to AH Motion Controller - Standard Instructions Manual and AH Motion Controller - Motion Control Instructions Manual . 5.2. Common Devices This section describes the concept of values/strings and devices which include input/output/auxiliary relays, timers, counters, and data registers. 5.2.1. Functions of Common Devices The procedure for processing the program in the PLC: Regenerating the input signal: Input terminal X 1. Before the program is executed, the state of the external Regenerating the input signal input signal is read into the memory of the input signal. Device memory 2.
When program is executed, the state in the memory of the input signal does not change even if the input signal Device memory changes from ON to OFF or from OFF to ON. Not until the Processing the program next scan begins will the input signal be refreshed. _5 Processing the program: Device memory After the input signal is refreshed, the instructions in the program are executed in order from the start address of the program, and the results are stored in the device memories. Regenerating the output signal and sending it to the output terminal Regenerating the state of the output:
After the instruction END is executed, the state in the device memory is sent to the specified output terminal. 5.2.2. Device List 5-2 Type Device name Number of devices Range Input relay X 8192 X0.0~X511.15 (Supporting Force ON/OFF) Output relay Y 8192 Y0.0~Y511.15 (Supporting Force ON/OFF) Bit device Data register D 1048576 D0.0~D65535.15 Link registers L 1048576 L0.0~ L65535.15 Auxiliary relay M 8192 M0~M8191 Special auxiliary SM