Modbus - Setting - M-system R9MWTU Instruction Manual

MODBUS - SETTING

■ SYSTEM SETTING
ADDR. WORD PARAMETER
9041 1 System configuration
0 : Single-phase / 2-wire (1CT)
1 : Single-phase / 3-wire (2CT)
2 : Three-phase / 3-wire, balanced load (1CT)
3 : Three-phase / 3-wire, unbalanced load (2CT) (*)
9042 1 Reserved
9043 1 Reserved
9044 2 VT rating, Primary
0 to 400 000 : Voltage (V)
Factory setting : 110
9046 1 VT rating, Secondary
50 to 500 : Voltage (V)
Factory setting : 110
The secondary can be set up to 500V. However, this does not mean the unit accepts 500V for
input. Do not use with the condition exceeding input rating written in the specification sheet
of the unit.
9047 1 Reserved
9048 1 Reserved
9049 1 Low-end cutout, Voltage
0 to 999 : Rated voltage × 0.001 × Specified value
Factory setting : 10
(*) Factory setting
■ DEMAND SETTING
ADDR. WORD PARAMETER
9057 1 Average (demand) current update interval
1 to 30 : Minutes
Factory setting : 30
Data updated at the integral multiple minutes of the setting
(e.g. Setting = 15 minutes, Updated at 0, 15, 30, and 45 minutes every hour)
9058 1 Average (demand) power update interval
1 to 30 : Minutes
Factory setting : 30
Data updated at the integral multiple minute of the setting
■ STYLE SETTING
ADDR. WORD PARAMETER
9073 1 Power factor (PF1 through PF3, PF) sign
0 : Standard (IEC), Identical to the active energy (*)
1 : Special type 1 (IEEE), Positive in LAG, Negative in LEAD
9074 1 Reactive power (Q1 through Q3, Q) sign
0 : Standard (IEC), Positive from PF = 1.0 to 180° in LAG direction; Negative for the other direction (*)
1 : Special type 1, Positive in LAG, Negative in LEAD
9075 1
Reactive power (Q1 through Q3) calculation (Q = Q1 + Q2 + Q3)
0 : Standard (*)
1 : Reactive power meter method
9076 1
Apparent power (S) calculation
0 : Standard (*)
1 : Sum
Note: '1,' '2,' '3' in expressions like Q1, Q2, Q3 indicate 'R,' 'S,' 'T phases' respectively.
Qn = √Sn
Qn =
Nsmp
S = √ P
+ Q
2 2
S = S1 + S2 + S3
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: info@m-system.co.jp
– Pn
2 2
Nsmp
1
∑
(Uni – Nui) I
i + (Nsmp / 4)
i = 1
R9MWTU
UNIT
---
V
V
%/10
UNIT
Minutes
Minutes
EM-6221 Rev.9 P. 10 / 20