55
EXAMPLE OF MODBUS PROTOCOL
REQUEST to the instrument with address 01:
":010308100041A3"+CR+LF
oppure
":0103FE0041BD"+CR+LF
Start Transmission
:
Instrument Address Command memory Address
#words to read LRC
01 03 0810 oppure FE00 0041 A3 oppure BD
End Transmission
0D0A
RESPONSE from instrum. 01 to all measurements request
":0103820D310040001204004301FE0101019980FE3802003802003802004301FE4301FE4301FE3703003703003703009980FE9980F
E
9980FE8084FF2484FF4784FF4103004003004003000000000000000000000201013581000005FF41010000FE61020000FE510200570
2002504FF10030154010100000000000000000000000000000000BF"+CR+LF
Start Transmission
:
Address Command Echo # of bytes Type of instrument Option1 Option2 Config1
01 03 82 0D (MICROVIP3 PLUS) 31 00 40
Config2 Volt(412) I (1.43) W (1010) PF(-.99) V1(238) V2(238) V3(238)
00 120400 4301FE 010101 9980FE 380200 380200 380200
I1(1.43) I2(1.43) I3(1.43) W1(337) W2(337) W3(337) PF1(-.99) PF2(-.99)
4301FE 4301FE 4301FE 370300 370300 370300 9980FE 9980FE
PF3(-.99) Var1(-48) Var2(-42.4) VAr3(-44.7) VA1(341) VA2(340) VA3(340)
9980FE 8084FF 2484FF 4784FF 410300 400300 400300
VA(1020) Var(-135) Hz(50) kWh+(1.41) kVArh+(2.61)
000000 000000 000000 020101 358100 0005FF 41010000FE 61020000FE
AvgVAr(251) AvgVA(257) AvgW(4.5) PeakVA(3100) PeakW(1540)
510200 570200 2504FF 100301 540101
kWh- (.46) kvarh- (.47)
46000000FE 47000000FE 0000000000
Data to be discarded LRC End Transmission
00 BF CR+LF (0Dh+0Ah)