User manual ELK PRODUCTS ELK-ML1

[. . . ] $10. 00 ELK - ML1 Data Logger & External Modem/Parallel Printer Interface PO Box 100 3266 US Hwy. 70 West Hildebran, NC 28637 USA Telephone 828/397-4200 FAX 828/397-4415 http://www. elkproducts. com Email: sales@elkproducts. com Elk Products, Inc Page 1 ML1 Instructions rev. 1. 0 L493 Introduction The Magic Module family of low cost field programmable controller modules offers a unique controller and data acquisition product line to markets not normally using such technology due to cost and complexity. The ELK ­ ML1 data logger & external modem/parallel printer interface enables the Magic Module System to log any data bus event on the RS-485 data bus. [. . . ] Reference the section on Printer String Commands and contact Elk Products Technical Department for help on creating your custom Printer Strings. Elk Products, Inc Page 15 ML1 Instructions rev. 1. 0 L493 Magic Module Data Bus Protocol Example Data Bus Command: Module. *<31:1240300?30= This command requests the status of relays on a Magic The Magic Module Data Bus Protocol is made up of the following elements: Byte 0 - * - Start Character. The "*" character marks the start of the Magic Module Data Bus Packet. In this case the number of characters until the first digit of the CRC is 12. The first byte "*" is not counted. See Single Byte Characters below for further information. This is the device type that the data packet is being sent to. In this case a type 3 is a MM443 Magic Module. See Single Byte Characters below for further information. This is available to the MM443 Magic Module as variable TypeTo. This is the device address that the data packet is being sent to. In this case a MM443 Magic Module set to an address of 1 on the data bus. See Single Byte Characters below for further information. This is the device type that the data packet is coming from. In this case a ":" or type 10 is a PC computer connected to the data bus. See Single Byte Characters below for further information. This is the device address that the data packet is being sent from. In this case a PC computer set to an address of 1 on the data bus. See Single Byte Characters below for further information. This is the data packet command expressed in hexadecimal. In this case Command 24 hex or 36 decimal is a Request For An Output Relay State. See Data Bus Commands and Two Byte Data below. [. . . ] Modem Hangup String ­ The modem string that is used to cause the modem to hangup the telephone line. Modem Connect After all modem settings have been set, the modem may be triggered to call the remote modem and connect into the Magic Module Data Bus by selecting CommPort/Modem Connect Modem Hangup Hangup the telephone line or command the local modem to disconnect from the remote modem by selecting CommPort/Modem Hangup or by clicking the Hangup Button on the Transmit Screen. Elk Products, Inc Page 26 ML1 Instructions rev. 1. 0 L493 Magic Module Data Bus Commands Each Type of device on the data bus has an assigned set of commands that it will respond to. There is also a global set of commands that all modules on the data bus will respond to. The following is a partial list of the commands that are available on the Magic Module Data Bus. [. . . ]