Read bits on a given register

[erji44]

Hello,

Have to read the bit 0-7 on a 16-bit register. over serial port modbus RTU.
Tried every possible combination of commands but could not achieve this.
I can read the register 16 itself which returns a 0 value but reading the bits 0-7 I could not find a way to do it.
Every bit holds a 0 or 1 value depending on state of the inputs on register 16.
Any ideas what the correct command is?
Does mbpoll have such capability?

Thank you