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| en:software:devices:modbus [2016/12/21 17:03] – [Read Input] qem103 | en:software:devices:modbus [2016/12/21 17:04] – [Read Coil] qem103 |
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| === Read Coil === | === Read Coil === |
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| Read bit function. You want to read the bits of a slave (//idcar//d). Sets the parameter //type// = 1.\\ You must set //addr// to indicate the address of the bit in the slave from which to start reading. The //num// parameter indicates the number of bits that are read. You must to set //tabreg// to indicate the index of the bit in the “data read table” the master from which you want to be written the read bits. The raedings value will be saved in the “data read table”. It is recommended to always meet the following two conditions:\\ | Bit read function. You want to read the bits of a slave (//idcar//d). Sets the parameter //type// = 1.\\ You must set //addr// to indicate the address of the bit in the slave from which to start reading. The //num// parameter indicates the number of bits that are read. You must to set //tabreg// to indicate the index of the bit in the “data read table” the master from which you want to be written the read bits. The raedings value will be saved in the “data read table”. It is recommended to always meet the following two conditions:\\ |
| (//addr// + //num// - 1) <= 512 e (//tabreg// + //num// - 1) <= 512 otherwise the request will fail (reporting by //wcmd//). | (//addr// + //num// - 1) <= 512 e (//tabreg// + //num// - 1) <= 512 otherwise the request will fail (reporting by //wcmd//). |
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