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Use this item to retrieve a block of registers and write them to a file. The actual item name to use is the first register number in the block, followed by a dash (‘-‘) and then the end register in the block. For example, the item ‘40001-41000’ will read one thousand registers and store them in the file. Set the item’s value to any positive non-zero value to start the read. The item’s value will be updated with the number of messages required to retrieve all the registers and will be updated with the count of remaining messages as it retrieves the registers. When the item’s value reaches zero (0), the retrieval is complete. If the item’s value becomes a negative number, an error occurred, and not all of the registers were successfully retrieved. The register data will be written to a file, one line per poll message response.

The file name format is<deviceis <device_name><BlockStart>-<BlockEnd>.

For example, registers read from block 40001-41000 from a device called RTU will be stored in the file ‘RTU40001-41000.txt’.

Note: Appending an "S" will convert the value to I2.