Siemens bt300 Operator's Manual page 156

Chapter 4 - Parameters and Menu Structure
I/O and Hardware (M5)
Communication status (P5.9.2.2.1.2)
The Communication status shows how many error messages and how many good messages the frequency
converter has received. The Communication status includes a common error counter that counts errors and a
counter for good messages.
This parameter displays as
For example, 01.002 would represent one bad frame and two good messages.
Illegal functions (P5.9.2.2.1.3)
This value counts error situations. The function code received in the query refers to an invalid action for the server
(or slave). This corresponds to Modbus fault code 01h.
Illegal data addresses (P5.9.2.2.1.4)
This value counts error situations. The data address received in the query refers to an invalid address for the
server (or slave). This corresponds to Modbus fault code 02h.
Illegal data values (P5.9.2.2.1.5)
This value counts error situations. A value contained in the query data field refers to an invalid value for server (or
slave). This corresponds to Modbus fault code 03h.
Slave device busy (P5.9.2.2.1.6)
This value counts error situations. The server (or slave) is engaged in processing a long–duration program
command. The client (or master) should retransmit the message later when the server (or slave) is free. This
corresponds to Modbus fault code 06h.
Memory parity error (P5.9.2.2.1.7)
This value counts error situations.The server (or slave) attempted to read record file but detected a parity error in
the memory. This corresponds to Modbus fault code 08h.
Slave device failure (P5.9.2.2.1.8)
This value counts error situations. An unrecoverable error occurred while the server (or slave) was attempting to
perform the requested action. This corresponds to Modbus fault code 04h.
Last fault response (P5.9.2.2.1.9)
Displays the last fault response as Fault code.
Control word (P5.9.2.2.1.10)
Displays the Control Word received from the bus.
Status word (P5.9.2.2.1.11)
Displays the current Status Word that is sent to the bus.
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Building Technologies
Table 130: FB Protocol Status.
INITIALIZING Protocol is starting up.
STOPPED Protocol is timed out or not used.
OPERATIONAL Protocol is running.
FAULTED Major fault in protocol, requires restarting. If fault remains contact
your local Siemens Industry office or Technical Support.
xx.yyy xx
where indicates bad frames and
Siemens BT300 HVAC Drive
yyy
indicates good messages.
DPD01809
2016-06-07