Modbus slave address/bit

[Novodk]

How do I define a bit number to an address?

51/0/0 should be bit 1
51/0/1 should be bit 2

mb.setswap('w')
mb.setfloat16precision(2)

mb.setmapping({
  ['*'] = {
    registers = {
      [12288] = '51/0/0',
      [12288] = '51/0/1',
    }
  }
})