5vacon • 23 ProgrammingTel. +358 (0) 201 2121 • Fax +358 (0)201 212 2055.4.3 Modbus TCP monitoring valuesThese values will not appear before the connection is established.5.4.3.1 Connection 1P5.8.2.2.1.1 F IELDBUS PROTOCOL STATUSFieldbus Protocol Status tells the status of the protocol.Table 10. FB protocol statusesP5.8.2.2.1.2 C OMMUNICATION STATUSThe Communication status shows how many error and how many good messages the frequen-cy converter has received. The Communication status includes a common error counter thatcounts errors and a counter for good messages.Table 11. Communication statusP5.8.2.2.1.3 I LLEGAL FUNCTIONSThe function code received in the query refers to an unallowed action for the server (or slave).P5.8.2.2.1.4 I LLEGAL DATA ADDRESSESThe data address received in the query refers to an unallowed address for the server (or slave).P5.8.2.2.1.5 I LLEGAL DATA VALUESA value contained in the query data field refers to an unallowed value for server (or slave).P5.8.2.2.1.6 S LAVE DEVICE BUSYThe 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.P5.8.2.2.1.7 M EMORY PARITY ERRORThe server (or slave) attempted to read record file but detected a parity error in the memory.INITIALIZING Protocol is starting upSTOPPED Protocol is timeouted or not usedOPERATIONAL Protocol is runningFAULTED Major fault in protocol, requires restarting.If fault remains contact fieldbus@vacon.comGood messages0…999 Number of messages received with-out errorsBad Frames0…99 Number of messages received witherrors