KROHNE MFC 400 Modbus - Manual (Page 33)

APPENDIX
8
33
MFC 400
www.krohne.com 05/2013 - 4002525102 - AD Modbus MFC 400 R02 en
8.2 NAMUR NE 107 status signals
8.3 Supported Modbus function codes
Function Code 0x01: Read Coils
Function Code 0x02: Read Discrete Inputs
F Failure Failure Failure Failure
Output signal invalid due to malfunction in the signal converter.
C Function Check Function Check Function Check Function Check
Output signal temporarily invalid due to ongoing work on the signal converter.
S Out of specification Out of specification Out of specification Out of specification
• Deviations from the permissible ambient or process conditions determined by
the signal converter itself through self-monitoring.
• Faults in the signal converter itself indicate that the measuring uncertainty of
flow sensors or deviations from the set value in actuators is probably greater
than expected under operating conditions.
M Maintenance required Maintenance required Maintenance required Maintenance required
Although the output signal is valid, the wear reserve is nearly exhausted or a
function will soon be restricted due to operational conditions.
Request Response Error
Function 0x01 Function 0x01 Function 0x81
Starting Address
Hi
0x00 to 0xFF Byte Count n Exception Code 0x01 / 0x02 /
0x03 / 0x04
Starting Address
Lo
0x00 to 0xFF Coil n Status
Quantity of Coils
Hi
n (0x00 to 0x07) ... ...
Quantity of Coils
Lo
n (0x01 to 0xFF)
max Quantity:
0x07D0
Request Response Error
Function 0x02 Function 0x02 Function 0x82
Starting Address
Hi
0x00 to 0xFF Byte Count n Exception Code 0x01 / 0x02 /
0x03 / 0x04
Starting Address
Lo
0x00 to 0xFF Input n Status
Quantity of
Registers Hi
n (0x00 to 0x07) ... ...
Quantity of
Registers Lo
n (0x01 to 0xFF)
max Quantity:
0x07D0