Omron E5CC/E5EC temperature controller

Register map(s) for this device, with a note of how far each has been checked. Addresses are 0-based, as on the wire. Scale and byte order are confirmed only at the hardware-verified rung.

coherence-checked

Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.

point	address (0-based)	type	scale
Operation Command	0	U16	1
PV	8192	I16	1
Status	8193	U16	1
Internal Set Point	8194	I16	1
Heater Current 1 Value Monitor	8195	I16	0.1
MV Monitor (Heating)	8196	I16	0.1
MV Monitor (Cooling)	8197	I16	0.1
Set Point	8451	I16	1
Alarm Value 1	8452	I16	1
Alarm Value Upper Limit 1	8453	I16	1
Alarm Value Lower Limit 1	8454	I16	1
Alarm Value 2	8455	I16	1
Alarm Value Upper Limit 2	8456	I16	1
Alarm Value Lower Limit 2	8457	I16	1
PV	9218	I16	1
Internal Set Point	9219	I16	1
Multi-SP No. Monitor	9220	I16	1
Status (lower word)	9222	U16	1
Status (upper word)	9223	U16	1
Status 2 (lower word)	9224	U16	1
Status 2 (upper word)	9225	U16	1
Decimal Point Monitor	9232	I16	1
Operation/Adjustment Protect	9472	I16	1
Initial Setting/Communications Protect	9473	I16	1
Setting Change Protect	9474	I16	1
PF Key Protect	9475	I16	1
Move to Protect Level	9476	I16	1
Password to Move to Protect Level	9477	I16	1
Parameter Mask Enable	9478	I16	1
Changed Parameters Only	9479	I16	1
Manual MV	9728	I16	1
Set Point	9729	I16	1
Remote SP Monitor	9730	I16	1
Heater Current 1 Value Monitor	9732	I16	1
MV Monitor (Heating)	9733	I16	1
MV Monitor (Cooling)	9734	I16	1
Valve Opening Monitor	9735	I16	1
Proportional Band (Cooling)	9985	I16	1
Integral Time (Cooling)	9986	I16	1
Derivative Time (Cooling)	9987	I16	1
Dead Band	9988	I16	1
Manual Reset Value	9989	I16	1
Hysteresis (Heating)	9990	I16	1
Hysteresis (Cooling)	9991	I16	1
Control Period (Heating)	9992	I16	1
Control Period (Cooling)	9993	I16	1
Position Proportional Dead Band	9994	I16	1
Open/Close Hysteresis	9995	I16	1
SP Ramp Time Unit	9996	I16	1
SP Ramp Set Value	9997	I16	1
SP Ramp Fall Value	9998	I16	1
MV at Stop	9999	I16	1
MV at PV Error	10001	I16	1
MV Change Rate Limit	10003	I16	1
PV Input Slope Coefficient	10008	I16	0.001
Heater Current 1 Value Monitor	10010	I16	0.1
Heater Burnout Detection 1	10011	I16	0.1
Leakage Current 1 Monitor	10012	I16	0.1
HS Alarm 1	10013	I16	0.1
Process Value Input Shift	10019	I16	1
Heater Current 2 Value Monitor	10020	I16	0.1
Heater Burnout Detection 2	10021	I16	0.1
Leakage Current 2 Monitor	10022	I16	0.1
HS Alarm 2	10023	I16	0.1
Soak Time Remain	10024	I16	1
Soak Time	10025	I16	1
Wait Band	10026	I16	1
Remote SP Input Shift	10027	I16	1
Remote SP input Slope Coefficient	10028	I16	0.001
Input Digital Filter	10240	I16	1
Moving Average Count	10244	I16	1
Extraction of Square Root Low-cut Point	10248	I16	1
FB Moving Average Count	10253	I16	1
SP 0	10496	I16	1
Alarm Value 1	10498	I16	1
Alarm Value Upper Limit 1	10499	I16	1
Alarm Value Lower Limit 1	10500	I16	1
Alarm Value 2	10501	I16	1
Alarm Value Upper Limit 2	10502	I16	1
Alarm Value Lower Limit 2	10503	I16	1
Alarm Value 3	10504	I16	1
Alarm Value Upper Limit 3	10505	I16	1
Alarm Value Lower Limit 3	10506	I16	1
Alarm Value 4	10507	I16	1
Alarm Value Upper Limit 4	10508	I16	1
Alarm Value Lower Limit 4	10509	I16	1
SP 1	10510	I16	1
SP 2	10524	I16	1
SP 3	10538	I16	1
SP 4	10552	I16	1
SP 5	10566	I16	1
SP 6	10580	I16	1
SP 7	10594	I16	1
Proportional Band	10752	I16	1
Integral Time	10753	I16	1
Derivative Time	10754	I16	1
MV Upper Limit	10757	I16	1
MV Lower Limit	10758	I16	1
Input Type	11264	I16	1
Temperature Unit	11265	I16	1
Scaling Lower Limit	11273	I16	1
Scaling Upper Limit	11275	I16	1
Decimal Point	11276	I16	1
Remote SP Upper limit	11277	I16	1
Remote SP Lower limit	11278	I16	1
PV Decimal Point Display	11279	I16	1
Control Output 1 Signal	11523	I16	1
Control Output 2 Signal	11524	I16	1
SP Upper Limit	11535	I16	1
SP Lower Limit	11536	I16	1
Standard or Heating/Cooling	11537	I16	1
Direct/Reverse Operation	11538	I16	1
Close/Floating	11539	I16	1
PID ON/OFF	11540	I16	1
ST	11541	I16	1
Program Pattern	11542	I16	1
Remote SP Input	11544	I16	1
Minimum Output ON/OFF Band	11545	I16	1
Transfer Output Type	11776	I16	1
Transfer Output Signal	11777	I16	1
Control Output 1 Assignment	11782	I16	1
Control Output 2 Assignment	11783	I16	1
Event Input Assignment 1	11786	I16	1
Event Input Assignment 2	11787	I16	1
Event Input Assignment 3	11788	I16	1
Event Input Assignment 4	11789	I16	1
Event Input Assignment 5	11790	I16	1
Event Input Assignment 6	11791	I16	1
Auxiliary Output 1 Assignment	11792	I16	1
Auxiliary Output 2 Assignment	11793	I16	1
Auxiliary Output 3 Assignment	11794	I16	1
Auxiliary Output 4 Assignment	11795	I16	1
Transfer Output Upper Limit	11796	I16	1
Transfer Output Lower Limit	11797	I16	1
Simple Transfer Output 1 Upper Limit	11798	I16	1
Simple Transfer Output 1 Lower Limit	11799	I16	1
Extraction of Square Root Enable	11812	I16	1
Travel Time	11824	I16	1
Alarm 1 Type	12032	I16	1
Alarm 1 Latch	12033	I16	1
Alarm 1 Hysteresis	12034	I16	1
Alarm 2 Type	12035	I16	1
Alarm 2 Latch	12036	I16	1
Alarm 2 Hysteresis	12037	I16	1
Alarm 3 Type	12038	I16	1
Alarm 3 Latch	12039	I16	1
Alarm 3 Hysteresis	12040	I16	1
Alarm 4 Type	12041	I16	1
Alarm 4 Latch	12042	I16	1
Alarm 4 Hysteresis	12043	I16	1
Standby Sequence Reset	12044	I16	1
Auxiliary Output 1 Open in Alarm	12045	I16	1
Auxiliary Output 2 Open in Alarm	12046	I16	1
Auxiliary Output 3 Open in Alarm	12047	I16	1
Auxiliary Output 4 Open in Alarm	12048	I16	1
Alarm 1 ON delay	12049	I16	1
Alarm 2 ON delay	12050	I16	1
Alarm 3 ON delay	12051	I16	1
Alarm 4 ON delay	12052	I16	1
Alarm 1 OFF delay	12053	I16	1
Alarm 2 OFF delay	12054	I16	1
Alarm 3 OFF delay	12055	I16	1
Alarm 4 OFF delay	12056	I16	1
PV/SP No. 1 Display Selection	12288	I16	1
MV Display Selection	12289	I16	1
Automatic Display Return Time	12291	I16	1
Display Refresh Period	12292	I16	1
PV/SP No. 2 Display Selection	12296	I16	1
Valve Opening Monitor Selection	12297	I16	1
Display Brightness	12298	I16	1
MV Display	12299	I16	1
Move to Protect Level Time	12300	I16	1
Auto/Manual Select Addition	12303	I16	1
PV Status Display Function	12305	I16	1
SV Status Display Function	12306	I16	1
Protocol Setting	12544	I16	1
Communications Unit No.	12545	I16	1
Communications Baud Rate	12546	I16	1
Communications Data Length	12547	I16	1
Communications Stop Bits	12548	I16	1
Communications Parity	12549	I16	1
Send Data Wait Time	12550	I16	1
PF Setting	12800	I16	1
Monitor/Setting Item 1	12802	I16	1
Monitor/Setting Item 2	12803	I16	1
Monitor/Setting Item 3	12804	I16	1
Monitor/Setting Item 4	12805	I16	1
Monitor/Setting Item 5	12806	I16	1
SP Tracking	13057	I16	1
PV Dead Band	13060	I16	1
Cold Junction Compensation Method	13061	I16	1
Integral/Derivative Time Unit	13065	I16	1
α	13066	I16	1
Manual Output Method	13068	I16	1
Manual MV Initial Value	13069	I16	1
AT Calculated Gain	13071	I16	1
AT Hysteresis	13072	I16	1
Limit Cycle MV Amplitude	13073	I16	1
Heater Burnout Latch	13076	I16	1
Heater Burnout Hysteresis	13077	I16	1
HS Alarm Latch	13078	I16	1
HS Alarm Hysteresis	13079	I16	1
Number of Multi-SP Points	13083	I16	1
HB ON/OFF	13084	I16	1
Integrated Alarm Assignment	13086	I16	1
MV at Stop and Error Addition	13088	I16	1
ST Stable Range	13089	I16	1
RT	13090	I16	1
HS Alarm Use	13091	I16	1
LBA Detection Time	13092	I16	1
LBA Level	13093	I16	1
LBA Band	13094	I16	1
Soak Time Unit	13095	I16	1
Alarm SP Selection	13096	I16	1
Remote SP Enable	13097	I16	1
Manual MV Limit Enable	13099	I16	1
Direct Setting of Position Proportional MV	13100	I16	1
PV Rate of Change Calculation Period	13101	I16	1
Heating/Cooling Tuning Method	13102	I16	1
LCT Cooling Output Minimum ON Time	13109	I16	1

link settings as documented (unverified): RTU; default 9600 8E2; unit ID 1; FC 03,06,08,16; When the Protocol Setting parameter is set to Modbus, the communications data length must be 8 bits, and the communications stop bits must be 1 bit by setting the communications parity to Even/Odd or it must be 2 bits by setting the parity to None.

⚠ Set the parameters of the product so that they are suitable for the system being controlled. If they are not suitable, unexpected operation may occasionally result in property damage or accidents. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)

terminals	RS-485 (2-wire, half-duplex)
A/B polarity	A is (-), B is (+)
termination	120 ohm (1/2 W) terminating resistance
connector	Screw terminal blocks, screwless clamp terminal blocks, push-in plus terminal blocks, or plug-in sockets depending on model
isolation	Non-isolated model (CJ1W-CIF11)
shield/ground	Shielded twisted-pair cable
max registers/read	106
response timeout	20 ms
inter-frame delay	2 ms
broadcast	supported
protocol notes	Allow a wait time of at least 2 ms before the next command is sent after the host receives a response from the E5@C.
identification notes	The unit number can be set between H'00 to H'63 hexadecimal (0 to 99 decimal).
environment	Indoor use only
certifications	UL listed, Lloyd's standards
doc revision	H175-E1-17

field reports — community-sourced, unverified (checked 2026-06-11)

By default, the Communications Writing (CMWt) parameter is set to OFF. This prevents writing parameters (such as the Set Point) via Modbus until it is manually changed to ON on the controller's front panel. [source]
RS-485 polarity labeling confusion: Omron labels terminal A as (-) and B as (+). Many third-party USB-to-RS485 converters use the opposite convention (A as (+) and B as (-)), meaning users must connect converter negative (-) to Omron A and converter positive (+) to Omron B rather than matching A-to-A and B-to-B. [source]
confirmed: comms defaults (baud rates [9600, 19200, 38400, 57600], default baud 9600, default unit ID 1, framing RTU, parity E, stop bits 2) — confirmed by E5[]C Digital Temperature Controllers Communications Manual (H175)
confirmed: register addresses (pv @ 8192, status @ 8193, internal_set_point @ 8194, heater_current_1_value_monitor @ 8195, mv_monitor_heating @ 8196, mv_monitor_cooling @ 8197, set_point @ 8451, alarm_value_1 @ 8452, alarm_value_upper_limit_1 @ 8453, alarm_value_lower_limit_1 @ 8454, alarm_value_2 @ 8455, alarm_value_upper_limit_2 @ 8456, alarm_value_lower_limit_2 @ 8457, decimal_point_monitor @ 9232, leakage_current_1_monitor @ 10012, heater_current_2_value_monitor @ 10020, leakage_current_2_monitor @ 10022, soak_time_remain @ 10024) — confirmed by E5[]C Digital Temperature Controllers Communications Manual (H175) in Two-byte mode
confirmed: physical polarity (A is (-), B is (+)) — confirmed by E5CC Instruction Sheet and Communications Manual (H175)
confirmed: inter-frame delay of at least 2 ms — confirmed by E5[]C Digital Temperature Controllers Communications Manual (H175)
confirmed: maximum read registers of 106 — confirmed by E5[]C Digital Temperature Controllers Communications Manual (H175) in Two-byte mode

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.
coherence-checked — Round-trips through a real Modbus stack with no overlapping addresses and a word-order-sensitive codec — the map is internally coherent and wire-decodable. Does NOT prove byte-order or scaling match a real device: the emulator is seeded from the map's own types, so a uniformly wrong byte-order still round-trips. Only hardware-verified confirms byte-order/scale on the wire.
hardware-verified (software-key) x1 — Matched a real device with operator-attested readings as ground truth — the only rung that confirms word order + scaling on the wire.

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