Meter Digital Lissafi Din Rail 2P Meter Elektronik

Misali na kai wata yanzu da idafa biyu ta dama, ya kamata idafin daidai da rubutun cikakken. Rubutun 21 na misali an yi shirin da rubutun mafiya, da rubutun 20 an yi shirin da rubutun mai tsaye. Rubutun 23 ya shirin da rubutun mafiya na RS485, da rubutun 24 ya shirin da rubutun mai tsaye na RS485. Cikakkenka kuma dai dai aiki kiniki da neman rubutun 5~27V DC da amfani mai sabon rubutun 27 mA DC.

1.9.4 Amfani na Misalin RS485 (Rubutun Sabon Gaba) da Adresan Register

An yi amfani da alamunƙwar masu rubutu don ya record data mai tsarin rubutu a cikin alamunƙwar a cikin RS485 tare da ya transcribe data mai tsarin rubutu a cikin alamunƙwar a cikin halitta na komputer ta ido da idonin irinnya mai amfani. Aiki na rubutu, parity (parity even) da mode na rubutu da data (tare da babban bits, bit stop) yana iya gabatar standard MODBUS-RTU. Sabon rate na rubutu yana iya biyu 1200bps, 2400bps, 4800bps ko 9600bps (default). Duk da ke yi shi, alamunƙwar yana iya setta a cikin sabon rate na rubutu na default 9600bps. Address na alamunƙwar da sabon rate na rubutu yana iya samun ba software ta kyau dai dai.

Sake yanzu ne gano sabon rubutun register, da aka gabatar daidai.

Rubutun data ne sabon wannan, read-only, ake yi shi command code 0x04 aiki.

Sabon rubutun parameter ne, ya kawo reading da writing, ake yi shi command code 0x03, da ake set shi command code 0x10.

Tare da RS-422, RS-485 ya ci gaba a cikin kewaye transmission distance da 1219 metara da transmission rate na 10 Mb/s. A kanƙawai na twisted pair ya zuba daga transmission rate. Kana iya aiki wannan cikakken cable amfani ta transmission rate ya kamata ga 100 kb/s. Transmission rate naɗaɗen ne biyu suna iya yi a cikin masu kwayenƙwace. Da fatan nan, transmission rate na maximum na twisted pair cable na 100 metara bane 1 Mb/s.

Network topology na RS-485 yanzu ya gabatar bus structure na terminal-matched, ya kamata suka samun ring ko star networks. Ya kamata aiki bus don samun nodes suna connected seri, da aka samun lead line a cikin bus ta nodes suna saboda wannan shi ya kamata suka zoƙe wani babban influence a cikin bus signal. Sabon gida, aka sami wannan continuous signal path don bayar bus.

Kafa na kashitor da kafa na pair ta tafiya yana gudanar a cikin terminaalin shield daya daya RS-485. Kafa ya kamata ne a matsayi mai tsaye a matsayin hanyar.

RoHS Compliant Lead Free Status 230V Reference Voltage ,5A Fundamental Current 80A Maximum Murrent Working Frequency ya kasance 50Hz±10% Internal Power Consumption ya kasance ≤2W / 10VA

Sake yanzu ne gano sabon rubutun register, da aka gabatar daidai.

Rubutun data ne sabon wannan, read-only, ake yi shi command code 0x04 aiki.

Sabon rubutun parameter ne, ya kawo reading da writing, ake yi shi command code 0x03, da ake set shi command code 0x10.

Sake yanzu zai iya record data mai amfani ta RS485 interface da zai iya transcribe data na electric energy a cikin sake yanzu a cikin handheld computer mai amfani ta infrared communication interface.