FCI ST80 Series User Manual

OPERATION ST80/ST80L Flow Meter
62 Fluid Components International LLC
Table 15 – Command Status Bytes, Bit Assignments
Byte Bit
Error/Status Description
Communication Error
Response Code (No Comm Error)
Byte 0
0
Reserved – Bit cleared to zero.
Command-Specific Response Code (0-127)
See Table 16 below.
1
Buffer Overflow – The message was too long for the
received buffer of the device.
2
Reserved – Bit cleared to zero.
3
Longitudinal Parity Error – The longitudinal parity
calculated by the device did not match the check byte at
the end of the message.
4
Framing Error – The stop bit of one or more bytes received
by the device was not detected by the UART (i.e., a mark or 1
was not detected when a stop bit should have occurred).
5
Overrun Error – At least one byte of data in the receive
buffer of the UART was overwritten before it was read (i.e.
the slave did not process incoming byte fast enough).
6
Vertical Parity Error – The parity of one or more of the bytes
received by the device was not odd
7
1: Set bit means byte represents communications error.
0: Cleared bit means byte represents response code.
Byte 1
Device
Status
0
Primary Variable Out of Limits – The PV is beyond its operating limit.
1
Non-Primary Variable Out of Limits – A device variable not mapped to the PV is beyond its operating limits.
2
Loop Current Saturated – The loop current has reached its upper (or lower) endpoint limit and cannot increase (or
decease) any further.
3
Loop Current Fixed – The loop current is being held at a fixed value and is not responding to process variations.
4
More Status Available – More status information is available. Refer to Command 48, Additional Device Status
Bytes, page 63.
5
Cold Start – A power failure or device reset has occurred.
6
Configuration Changed – An operation was performed that changed the device’s configuration.
7
Device Malfunction – The device detected a serious error or failure that compromises device operation.
Table 16 – Command-Specific Response Codes
Code
(Class) Description
Code
(Class) Description
00
(Success) No command-specific errors
12
(Error) Upper Range value too low/Invalid mode
02
(Error) Invalid selection/Invalid Poll Address
13
(Error) Upper and Lower Range values out of
limit
03
(Error) Passed parameter too large
14
(Warning) Span too small/Status byte mismatch
04
(Error) Passed parameter too small
16
(Mode Error) Access restricted
05
(Error) Too few data bytes received
18
(Error) Invalid units code
06
(Misc Error) Device-specific command error
29
(Error) Invalid Span
07
(Mode Error) In Write-Protect mode
30
(Error) Command response truncated
09
(Error) Invalid date code/Configuration change
counter mismatch/Lower range value too
high/Incorrect loop current mode or value
32
(Error) Busy
10
(Error) Lower Range value too low
64
(Error) Command not implemented
11
(Error) Upper Range value too high/Loop
current not active (device in multidrop mode)
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FCI ST80 Series Specifications

General

Brand	FCI
Model	ST80 Series
Category	Measuring Instruments
Language	English