SATEC PM130 PLUS Modbus register map

Device identity

What a tool can read to check that this map fits the connected device (SPEC.md section 4.7). Registers with a role are read like any other register.

Sources and notes

• Series PM130 PLUS Powermeters PM130P/PM130E/PM130EH, Modbus Communications Protocol Reference Guide · version BG0427 Rev. A10, 2022-03

• Registers are numbered from 0 as in the guide (add 40001 for a 5-digit 4XXXX address). Function 03 and 04 read the same registers.
• 32-bit values use two registers with the low-order word first (word_order little). They are read here in the default 32-bit integer format. Register 246 can switch analog values, counters and energy to IEEE float32; with that setting the integer registers of this map decode wrongly.
• Units of the 32-bit values depend on the device resolution option (register 2390). Low resolution (default) is assumed: 1 V, 1 A and 1 kW/kvar/kVA, in primary units (PT and CT ratios applied). High resolution gives 0.1 V (PT ratio 1) or 1 V, 0.01 A, and 1 W/var/VA (PT ratio 1) or 1 kW/kvar/kVA.
• Energy registers (14720 onward), demands, summary/TOU registers and phase energies exist only in PM130E and PM130EH. Total harmonic values (THD, K-factor, TDD) are only in PM130EH. Harmonics, PF, frequency and reactive values do not apply to DC devices.
• In 3-wire connection schemes the per-phase current unbalance, power factor, active power and reactive power read zero; only the totals are meaningful.
• The 16-bit scaled registers (256-308 and 6656 onward), the harmonic spectra, min/max logs with timestamps, data logs and file transfer, TOU and IEC 60870/DNP setup are not included.
• Total PF lag and lead (offsets 8-12 of the 1-second total block) are printed as UINT16 in a 32-bit block and are left out. The instrument options bitmap (2566-2567) is split into the low-word flags and the I/O counts.
• The Device Identification block (serial number, model ID and name, device firmware version) is printed at address 46111 with offsets +0 to +31, which collides with the Factory Device Settings block that starts at 46112. It is left out; use the firmware version at 2565. Network IP addresses are left out because their word order is not stated.
• Setup registers are best written together in a single request, or after zeroing the setup (guide, section 1). When password protection is enabled, write the password to register 2575 first.
• Not tested on a device.