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. [. . . ] 1. 0 L493 Printer ­ Printer Strings This screen is the setup screen for the Printer Strings. A Printer String defines the format that the printer will use to print the logged data. 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. In this case a MM443 Magic Module set to an address of 1 on the data bus. In this case a ":" or type 10 is a PC computer connected to the data bus. In this case Command 24 hex or 36 decimal is a Request For An Output Relay State. It is a 16 bit or 4 character value that insures the data that has been transmitted is correct. Four Single Byte Characters are combined together to form the CRC Value. The value of the length character will always point to the first character of the CRC Value. In this case ?30= value is equal to 62221 decimal and F30D hexadecimal. Carriage Return and Line Feed (13 and 10 decimal value) always terminate a data packet. Single Byte Characters Single byte characters have a decimal value from 0 to 31. We use the ASCII character set to represent these characters as follows: 0 = value 0 1 = value 1 2 = value 2 3 = value 3 4 = value 4 5 = value 5 6 = value 6 7 = value 7 8 = value 8 9 = value 9 : = value 10 ; = value 11 < = value 12 = = value 13 > = value 14 ?= value 15 @ = value 16 A = value 17 B = value 18 C = value 19 D = value 20 E = value 21 F = value 22 G = value 23 H = value 24 I = value 25 J = value 26 K = value 27 L = value 28 M = value 29 N = value 30 O = value 31 Elk Products, Inc Page 16 ML1 Instructions rev. 1. 0 L493 Two Byte Data Command and data are expressed in two byte characters, which are a hexadecimal value. A hexadecimal character can be from 0 to F (0123456789ABCDEF), which has a decimal value from 0 to 15. When the two hexadecimal characters are combined together with a hexadecimal range from 00 to FF, they have a decimal value range from 000 to 255. To convert a hexadecimal two byte value to decimal use the following procedure: 1. Multiply the left character value from the Hexadecimal Value Table below times 16. Add the right character value from the Hexadecimal Value Table below to the value in step 1. Hexadecimal Value Table 0 = value 0 1 = value 1 2 = value 2 3 = value 3 4 = value 4 5 = value 5 6 = value 6 7 = value 7 8 = value 8 9 = value 9 A = value 10 B = value 11 C = value 12 D = value 13 E = value 14 F = value 15 Printer String Commands A Printer String is used to format the logged data into a readable string that makes sense when printed on the printer. [. . . ] Bus Com Port ­ Set the serial communication port for the Magic Module Data Bus. Telephone Number To Dial - Enter the telephone number to dial the modem. The factory set installer password is "Superuser". Note: Passwords are CASE sensitive, so use capital letters where needed. Modem Reset String ­ The string command to reset the modem. Modem Dial String ­ The string prefix that is used before dialing a number. [. . . ]