Watlow Series F4 controller

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire; word order and scaling are only confirmed at the hardware-verified rung.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

point	address (0-based)	type	scale	unit
input_1_value	100	I16	0.1
input_2_value	104	I16	0.1
input_3_value	108	I16	0.1
set_point_1	300	I16	0.1	V
set_point_2	319	I16	0.1	V
power_output_1a	103	I16	1	%
power_output_1b	107	I16	1	%
power_output_2a	111	I16	1	%
power_output_2b	115	I16	1	%
alarm_1_status	102	U16	1
alarm_2_status	106	U16	1
input_1_error	101	U16	1
input_2_error	105	U16	1
input_3_error	109	U16	1
cjc1_temp	1500	I16	0.1
cjc2_temp	1531	I16	0.1
line_frequency	1515	U16	1

link settings as documented (unverified): RTU; default 19200 8N1; unit ID 1; Protocol or parity should be 8, n, 1.

⚠ WARNING: Install high- or low temperature-limit control protection in systems where an over temperature fault condition could present a fire hazard or other hazard. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	Touch-safe, removable terminal blocks, accepts 12- to 22-gauge wire
A/B polarity	T+/R+, T-/R-
termination	May need termination and pull-up and pull-down resistors (120 ohm)
isolation	Sensor input isolation from input to input to output to communication circuitry is 500V~ (ac)
shield/ground	Shield on EIA/TIA-232 connections
protocol notes	Two sets of Modbus registers contain profile information: edit mode and run mode.
model register	0
serial register	1
firmware register	3
power	100-240V~ (ac), -15%, +10%; 50/60Hz, ±5% or 24-28V~ (ac/dc), -15%, +10% (order option), 39VA maximum power consumption
environment	Operating: 32 to 130°F (0 to 55°C), 0 to 90% RH, non-condensing. Storage: -40 to 158°F (-40 to 70°C)
accuracy	Calibration accuracy and sensor conformity: ±0.1% of span ±1 LSD @ 77°F ±5°F (25°C ±3°C) ambient
certifications	UL®/C-UL 916-listed, File # E185611, CE to EN 61010, NEMA 4X and IP65, CE EMC to EN 50082-2, CE EMC to EN 55011
doc revision	0600-0032-0000 Rev E, October 2000

generated by gemini:gemini-3.5-flash · harvested from https://www.cszindustrial.com/portals/1/pdf/WatlowF4_UserManual.pdf (Watlow); manual-faithful — the document's claims, panel risk: ELEVATED — panel is not confident; proved interop-verified on 2026-06-10 · recorded 2026-06-10

The trust ladder

Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.

generated — A prompt produced it. Unproven — anyone can regenerate this.
structure-verified — Decode path is structurally sound (addresses, widths, finite values). Does NOT prove word order or scaling.
interop-verified — Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.
simulator-verified — Decoded correctly against a protocol emulator seeded with known-true values — catches word-order/scaling errors vs the emulator, not the physical device.
hardware-verified x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

Have a device that isn't here? Upload its register map — generation is free, and the connector earns its rung by being proven, not claimed.

Need it proven on your own device? Hardware verification — if it doesn't verify, you don't pay.

Building a platform? License the verified library — machine-readable maps, firmware matrix, API access.