1MODBUS_READ_INPUT_RE(3)        Libmodbus Manual        MODBUS_READ_INPUT_RE(3)
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NAME

6       modbus_read_input_registers - read many input registers
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SYNOPSIS

9       int modbus_read_input_registers(modbus_t *ctx, int addr, int nb,
10       uint16_t *dest);
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DESCRIPTION

13       The modbus_read_input_registers() function shall read the content of
14       the nb input registers to address addr of the remote device. The result
15       of the reading is stored in dest array as word values (16 bits).
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17       You must take care to allocate enough memory to store the results in
18       dest (at least nb * sizeof(uint16_t)).
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20       The function uses the Modbus function code 0x04 (read input registers).
21       The holding registers and input registers have different historical
22       meaning, but nowadays it’s more common to use holding registers only.
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RETURN VALUE

25       The modbus_read_input_registers() function shall return the number of
26       read input registers if successful. Otherwise it shall return -1 and
27       set errno.
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ERRORS

30       EMBMDATA
31           Too many bits requested
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SEE ALSO

34       modbus_read_input_bits(3) modbus_write_register(3)
35       modbus_write_registers(3)
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AUTHORS

38       The libmodbus documentation was written by Stéphane Raimbault
39       <stephane.raimbault@gmail.com[1]>
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NOTES

42        1. stephane.raimbault@gmail.com
43           mailto:stephane.raimbault@gmail.com
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47libmodbus 3.0.8                   07/31/2019           MODBUS_READ_INPUT_RE(3)