[seb5g]

Before: Eurotherm controllers were only usable through the nupylab drivers (GitHub only, built on minimalmodbus, GPLv3), which pymodaq_plugins_eurotherm depends on, or through ad-hoc pymodbus code for the EPC3008.

After: from pymeasure.instruments.eurotherm import Eurotherm2200, Eurotherm2400, Eurotherm3216, Eurotherm3500, EurothermEPC3000 gives pymeasure-native drivers, usable with any pymeasure adapter and testable with expected_protocol. Serial links use Modbus RTU, Ethernet (TCPIP::<ip>::502::SOCKET) uses Modbus TCP.

How: EurothermBase(Instrument) implements Modbus (functions 0x03 and 0x10) over write_bytes/read_bytes, with RTU framing (CRC16) or TCP framing (MBAP header), chosen from the resource string or the tcp argument. Commands are "<kind>,<address>[,<value>]" with kind I (16-bit register), F (float) or T (time in s); floats and times go to the IEEE region (0x8000 + 2*address). Properties are regular Instrument.control/measurement. 3216 program segments, 2400 setpoints, programs and their segments, and the two 3500 loops are Channels whose address offset is applied in insert_id (nested for program → segment).

Adélaïs Bruel (PID registers, plugin logic) and Pierre-Anne Bausson (3500 register map) are added to AUTHORS.txt.

Setpoints and EEPROM: the Eurotherm manuals limit the non-volatile memory to about 100,000 writes and recommend the remote (comms) setpoint for changing values. The docstrings say so, and remote_setpoint is available on the 2200, 2400, 3216 and EPC3000 (alternative_setpoint on the 3500 loops). Its address is confirmed for the 3216 (26, rewrite within 5 s) and the EPC3000 (277, rewrite every second); for the 2200, 2400 and 3500 it is inferred and marked as such.

Notes:

• Code was written from scratch (nupylab is GPLv3, pymeasure is MIT); only the register map / parameter selection follows nupylab, credited in the docstring. The EPC3000 register map follows the MIT-licensed EPC3008 plugin of LNicolasOnera/pymodaq_plugins_eurotherm, also credited. The 3500 register map (loop 2 at loop 1 + 1024) follows the MIT-licensed 3500 driver of PABausson/pymodaq_plugins_eurotherm, also credited.
• RTU test frames were generated with minimalmodbus, TCP test frames with pymodbus. Not yet tested on hardware.
• The EPC3000 driver reads floats from the IEEE region, whereas the EPC3008 plugin read scaled 16-bit integers; to check on hardware.
• 2400 program_status: nupylab uses 1 reset, 2 run, 4 hold, 8 holdback, 16 complete, while lapkindm/eurotherm2000 uses 0 reset, 1 run, 2 hold, 3 complete for the same register. The driver follows nupylab; which one is right is not confirmed and could not be tested, as the docstring warns.
• The 3500 driver reads floats from the IEEE region instead of scaled integers; manual_output (3) and the loop 2 rate limit disable (1102) are inferred.
• 2400 programs/segments are created statically (programs 0-20, 16 segments each) instead of being discovered from the instrument at init, to keep the constructor communication-free.

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https://claude.ai/code/session_01DEVtMjKj8sTCBv7uiR4gzQ

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[seb5g]

"Code Coverage on codecov" fails at the upload step, not in the tests: Codecov answers Token required because branch is protected. This fork has no CODECOV_TOKEN secret, so the upload will fail for any PR here; nothing in this PR can fix it. The test suite itself passed in that job, and Lint/Type Check and Docs are green on the current head. It should pass once the PR is opened against pymeasure/pymeasure, which has the token.

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