INVT Goodrive 35 Series Operation Manual page 241

Goodrive35 inverters Appendix A Extension card
information from subsidiary machine then give feedback signal. EC-TX-103 communication card
supports PROFIBUS-DP protocol.
2. Service access point
PROFIBUS-DP has access to PROFIBUS data link layer (Layer 2) services through service access
point SAP. Every independent SAP has clearly defined function. Please refer to relevant PROFIBUS
user manual to know more about service access point information. PROFIDRIVE - Variable speed
drive adopts PROFIBUS model or EN50170 standards (PROFIBUS protocol).
3. PROFIBUS -DP information frame data structure
PROFIBUS-DP bus mode allows rapid data exchange between master station and inverter. Adopting
master-slave mode dealing with inverter access, inverter is always subsidiary station, and each has
definite address. PROFIBUS periodic transmission messages use 16 words (16 bit) transmission, the
structure shown in figure1.
Parameters area:
P KW1-Parameter identification
P KW2-array index number
P KW3-parameter value 1
P KW4-parameter value 2
Process data:
CW-Control word (from master to slave, see Table 1)
SW-state word (from slave to master, see Table 3)
PZD-process data (decided by users) (From master to slave output 【given value】, from slave to
master input【actual value】)
PZD area (process data area)
PZD area of communication message is designed for control and monitor inverter. PZD from master
and slave station is addressed in high priority; the priority of dealing with PZD is superior to that of P
KW, and always sends current valid date from interface.
Control word (CW) and state word (SW)
Control word (CW) is a basic method of fieldbus system controlling inverter. It is sent by the fieldbus
master station to inverter and the EC-TX-103 communication cards act as gateway. Inverter responds
according to the control word and gives feedbacks to master machine through state word (SW).
Contents of control word and state word are shown in table 4.6 and table 4.7 respectively. Please
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