Siemens HydroRanger 200 Instruction Manual page 120

• If the host attempts to write one or more registers that are out of range, an
exception response code 2 or 3 is generated, depending if the start address is valid.
• If the host used an unsupported function code, an exception response code of 01
should be generated. However, this is not guaranteed and there may be no
response.
Page 110 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03