Siemens 9410 Series User Manual

Communications 9410 series
Modbus implementation
Your meter's Modbus implementation includes exception codes, invalid register
responses, fixed and configurable register maps, and security.
Modbus exception codes
Code Name Description
01 Illegal function The requested command is invalid.
02 Illegal address This code indicates one of the following:
• The requested address is invalid for that function.
• The requested address is not within the valid register
range for this device.
• The requested address is protected by device security.
03 Illegal value This code indicates one of the following:
• The requested value is not allowed for that register in
the device.
• The requested register is part of a multi-word value.
Modbus invalid read registers responses
Invalid type Read response
Unmapped (unused)
1
register 0x8000
Reserved
1
register responses by type
Signed integer 16-bit 0x8000
Unsigned integer 16-bit 0xFFFF
Signed integer 32-bits 0x80000000
Unsigned integer 32-bits 0xFFFFFFFF
Signed integer 64-bits 0x8000000000000000
Float32 0xFFC00000
(NaN = Not a number)
1
IRIG-B can only be connected to one of the digital inputs located on the meter base, not an option
module. Unmapped (unused) registers are registers that will never be used by the meter, and therefore
have no defined format. Reserved registers have a defined format and are intended for use by the meter,
its options or its variants.
Modbus invalid write registers response
If the meter receives a write command to a Modbus register address that does not
have a register mapped, the meter does not respond. No data is written or stored, and
the meter does not send back a rejection to the request.
If the meter receives a write command to a read-only Modbus register address,
exception code 3 (illegal value) is returned.
Fixed and configurable Modbus map
Your device has a fixed (static) register map for meter data and a flexible, user-
configured register map.
Modbus security
Your meter’s onboard security options include Modbus-specific settings. These
security settings may need to be configured in order to write Modbus data to the meter.
7EN05-0336-03 77

Siemens 9410 Series Specifications

General

Brand	Siemens
Model	9410 Series
Category	Measuring Instruments
Language	English