55 lines
1.9 KiB
Plaintext
55 lines
1.9 KiB
Plaintext
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module Modbus;
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export {
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## Standard defined Modbus function codes.
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const function_codes = {
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[0x01] = "READ_COILS",
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[0x02] = "READ_DISCRETE_INPUTS",
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[0x03] = "READ_HOLDING_REGISTERS",
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[0x04] = "READ_INPUT_REGISTERS",
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[0x05] = "WRITE_SINGLE_COIL",
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[0x06] = "WRITE_SINGLE_REGISTER",
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[0x07] = "READ_EXCEPTION_STATUS",
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[0x08] = "DIAGNOSTICS",
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[0x0B] = "GET_COMM_EVENT_COUNTER",
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[0x0C] = "GET_COMM_EVENT_LOG",
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[0x0F] = "WRITE_MULTIPLE_COILS",
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[0x10] = "WRITE_MULTIPLE_REGISTERS",
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[0x11] = "REPORT_SLAVE_ID",
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[0x14] = "READ_FILE_RECORD",
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[0x15] = "WRITE_FILE_RECORD",
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[0x16] = "MASK_WRITE_REGISTER",
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[0x17] = "READ_WRITE_MULTIPLE_REGISTERS",
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[0x18] = "READ_FIFO_QUEUE",
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[0x2B] = "ENCAP_INTERFACE_TRANSPORT",
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[0x5B] = "OBJECT_MESSAGING", # See https://modbus.org/docs/Object_Messaging_Protocol_ExtensionsVers1.1.doc
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# Machine/vendor/network specific functions
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[0x09] = "PROGRAM_484",
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[0x0A] = "POLL_484",
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[0x0D] = "PROGRAM_584_984",
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[0x0E] = "POLL_584_984",
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[0x12] = "PROGRAM_884_U84",
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[0x13] = "RESET_COMM_LINK_884_U84",
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[0x28] = "PROGRAM_CONCEPT",
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[0x29] = "MULTIPLE_FUNCTION_CODES", # See https://patents.google.com/patent/US20040054829A1/en
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[0x5A] = "PROGRAM_UNITY", # See https://lirasenlared.blogspot.com/2017/08/the-unity-umas-protocol-part-i.html
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[0x7D] = "FIRMWARE_REPLACEMENT",
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[0x7E] = "PROGRAM_584_984_2",
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[0x7F] = "REPORT_LOCAL_ADDRESS",
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} &default=function(i: count):string { return fmt("unknown-%d", i); } &redef;
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const exception_codes = {
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[0x01] = "ILLEGAL_FUNCTION",
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[0x02] = "ILLEGAL_DATA_ADDRESS",
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[0x03] = "ILLEGAL_DATA_VALUE",
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[0x04] = "SLAVE_DEVICE_FAILURE",
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[0x05] = "ACKNOWLEDGE",
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[0x06] = "SLAVE_DEVICE_BUSY",
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[0x08] = "MEMORY_PARITY_ERROR",
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[0x0A] = "GATEWAY_PATH_UNAVAILABLE",
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[0x0B] = "GATEWAY_TARGET_DEVICE_FAILED_TO_RESPOND",
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} &default=function(i: count):string { return fmt("unknown-%d", i); } &redef;
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}
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