202 ACQ550-U1 User’s Manual
Embedded fieldbus
The following table summarizes the 4xxxx drive control registers 40001…40099 (for 
4xxxx registers above 40099, see the drive parameter list, e.g. 40102 is parameter 
0102):
Modbus register Access Remarks
40001 CONTROL WORD R/W Maps directly to the profile‘S CONTROL WORD. Supported only 
if 5305 = 0 or 2 (ABB Drives profile). Parameter 5319 holds 
a copy in hex format.
40002 Reference 1 R/W Range = 0…+20000 (scaled to 0…1105 REF1 MAX), or 
-20000…0 (scaled to 1105 
REF1 MAX…0).
40003 Reference 2  R/W Range = 0…+10000 (scaled to 0…1108 
REF2 MAX), or 
-10000…0 (scaled to 1108 
REF2 MAX…0).
40004 STATUS WORD R Maps directly to the profile‘S STATUS WORD. Supported only if 
5305 = 0 or 2 (ABB Drives profile). Parameter 5320 holds a 
copy in hex format.
40005 Actual 1 
(select using 5310)
R By default, stores a copy of 0103 OUTPUT FREQ. Use 
parameter 5310 to select a different actual value for this 
register.
40006 Actual 2
(select using 5311)
R By default, stores a copy of 0104 CURRENT. Use parameter 
5311 to select a different actual value for this register.
40007 Actual 3 
(select using 5312)
R By default, stores nothing. Use parameter 5312 to select an 
actual value for this register.
40008 Actual 4
(select using 5313)
R By default, stores nothing. Use parameter 5313 to select an 
actual value for this register.
40009 Actual 5 
(select using 5314)
R By default, stores nothing. Use parameter 5314 to select an 
actual value for this register.
40010 Actual 6 
(select using 5315)
R By default, stores nothing. Use parameter 5315 to select an 
actual value for this register.
40011 Actual 7 
(select using 5316)
R By default, stores nothing. Use parameter 5316 to select an 
actual value for this register.
40012 Actual 8 
(select using 5317)
R By default, stores nothing. Use parameter 5317 to select an 
actual value for this register.
40031 ACQ550 
CONTROL WORD 
LSW
R/W Maps directly to the Least Significant Word of the DCU 
profile‘s CONTROL WORD. Supported only if 5305 = 1. 
See parameter 0301.
40032 ACQ550 
CONTROL 
WORD MSW
R Maps directly to the Most Significant Word of the DCU 
profile‘s CONTROL WORD. Supported only if 5305 = 1. 
See parameter 0302.
40033 ACQ550 
STATUS WORD 
LSW
R Maps directly to the Least Significant Word of the DCU 
profile‘s STATUS WORD. Supported only if 5305 = 1. 
See parameter 0303.
40034 ACQ550 
STATUS WORD 
MSW
R Maps directly to the Most Significant Word of the DCU 
profile‘s STATUS WORD. Supported only if 5305 = 1. 
See parameter 0304.