How do I configure an SLC 5/03 as a master with a SCADAPack as a slave?
Allen Bradley SLC 5/03 DF1
My settings and other notes are below on how to set up an A/B SLC and a SCADAPack to have the SLC poll the SP for data using a MSG instruction.
h2. SLC 5/03 settings:
*Channel 0* * DF1 Full Duplex, 9600, N, 1, Address 1 (or as required) * No Handshaking, CRC, Embedded Responses Enabled * Duplicate Packet Detect Disabled * Ack Timeout 50 (x20ms), NAK & ENQ Retries 3
*Read MSG* * Type - Peer to Peer * Read/Write - Read * Target Device - 485CIF * Local/Remote - Local * Control Block - N7:0 (or as required)
*Data Table Address* * Any N9:xx word address (as destination) * Size in Elements - Number of words to read * Channel - 0 * Message Timeout - 5 (default) * Data Table Offset - 0 (or as required - this is a BYTE value offset of the data in the SCADAPack. Eg an Offset of 10 refers to Modbus addresses 00081 - 00096) * Local Node Addr - 2 (as required - this is the SCADAPack)
*Write MSG* * Type Peer to Peer * Read/Write - Write * Target Device - 485CIF * Local/Remote - Local * Control Block - N7:20 (or as required)
*Data Table Address* * Any N9:xx word address (as source) * Size in Elements - Number of words to write * Channel - 0 * Message Timeout - 5 (default) * Data Table Offset - 128 (or as required - this is a BYTE value) * Start address in Modbus = 00001 (bit addressing) Eg (128 * 8) + 00001 = 01025 Modbus * Local Node Addr - 2 (as required - this is the SCADAPack)
*Notes:* * The Data Table Offset refers to the address in the SCADAPack. A value of 0 points to the first byte in the SCADAPack's memory. Size In Elements is a value in words. (16 bit blocks) Thus doing a Read of 1 element starting at Offset 0 will read Modbus addresses 00001 - 00016. Doing a Write of 1 element starting at Offset 2 will write to Modbus addresses 00017 - 00032. * The SLC's 485CIF read and write commands will only accept a maximum Offset of 255. As a result it is necessary to use MOVE instructions in TelePACE to place integer or float data down into the first 128 words (256 bytes) of Modbus addresses (00001 - 02048). * Select Byte Addressing by setting S:2/8 true on an unconditional rung. * Remember to trigger your MSG blocks only as required. \\
h2. SCADAPack Serial Port Settings:
* Port selected - com 2 * Protocol - DF1 Full Duplex CRC * Station - 2 (as required but must be same as used in the MSG blocks) 9600 baud, No Parity, No TX Flow control Port Type - RS-232 * MOVE function settings: * Source Block - word or bit level data, eg analogs at 30001 Destination Block - eg 00081 81/16 = 5th word, first bit Or 00001 first word, first bit * Number of Registers - Number of 16 bit registers to move * Ensure that the correct Type of controller is selected, and then that the settings are downloaded into the SCADAPack. * Use a 3 wire null modem cable. (TxD to RxD, RxD to TxD)