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.
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 |
|---|---|---|---|---|
| pv_value | 256 | I16 | 1 | |
| execution_sv_value | 257 | I16 | 1 | |
| control_output_1 | 258 | I16 | 0.1 | % |
| control_output_2 | 259 | I16 | 0.1 | % |
| operation_flag | 260 | U16 | 1 | |
| event_output_flag | 261 | U16 | 1 | |
| execution_sv_no | 262 | U16 | 1 | |
| execution_pid_no | 263 | U16 | 1 | |
| remote_input_value | 264 | I16 | 1 | |
| hb_current_value | 265 | U16 | 0.1 | A |
| hl_current_value | 266 | U16 | 0.1 | A |
| di_input_state_flag | 267 | U16 | 1 | |
| ch1_pv_measuring_range | 640 | I16 | 1 | |
| ch2_pv_measuring_range | 641 | I16 | 1 | |
| sv_no_1 | 768 | I16 | 1 | |
| sv_no_2 | 769 | I16 | 1 | |
| sv_no_3 | 770 | I16 | 1 | |
| sv_no_4 | 771 | I16 | 1 | |
| sv_no_5 | 772 | I16 | 1 | |
| sv_no_6 | 773 | I16 | 1 | |
| sv_no_7 | 774 | I16 | 1 | |
| sv_no_8 | 775 | I16 | 1 | |
| sv_no_9 | 776 | I16 | 1 | |
| sv_no_10 | 777 | I16 | 1 |
⚠ To prevent uncontrollable situations such as host program runaway, communication between the SR23 and the host can be forcibly terminated by holding down the ENT and STEP keys simultaneously for at least three seconds. — Starkest reads only; we never write a control register.
| terminals | RS-232C: SD(3), RD(2), SG(5) on host to RD(14), SD(13), SG(12) on controller. RS-485: +(13), -(14), SG(12) |
| A/B polarity | Mark state: - terminal < + terminal, Space state: - terminal > + terminal |
| termination | Attach a terminator of about 1/2W 120Ω to the endmost terminal (between + and - terminals) |
| shield/ground | FG |
| wiring notes | RS-232C max distance 15m, RS-485 max distance 500m. RS-485 supports up to 31 devices. |
| broadcast | supported |
| sentinel values | Sc.HH/Cj.HH/b = 7FFFH, Sc.LL/Cj.LL = 8000H, HBL/HLA display = 7FFFH, HB current value when output is OFF and HL current value when output is ON = 7FFEH |
| protocol notes | In tri-state control, a delay of about 1 msec (max) after end of transmission of the end bit of the end character up to the return from high impedance is generated. It sometimes takes about 400 ms to process commands in the case of the write command. |
| model register | 0040 |
| identification notes | Series codes 1 to 4 are located at registers 0040H to 0043H (64 to 67). |
| doc revision | MSR23-E04-B, Feb. 2015 |
Each rung states what it proved and what it did not. Gray until proven; green is earned by hardware only.
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