NORD Drivesystems BU0060 - Manual (Page 98)

CANopen – Supplementary manual options for NORD - Frequency Inverters
98 BU 0060 GB-4112
7.4 Reading and writing parameter data (SDO)
Reading and writing of parameter data is performed via SDOs and is illustrated in the following
examples.
Detailed information about the structure of an SDO (e.g: definition of the control bytes) can be found in
Section 4.3.4.
Example
Node ID =50
dec
= 32
hex
Transmission address: = 632
hex
(600
hex
+ 32
hex
)
Receive address: = 5B2
hex
(580
hex
+ 32
hex
)
P102 „"Acceleration time": = 102
dec
= 66
hex
à 2000
hex
+ 66
hex
= 2066
hex
Parameter set 1 = 01
hex
Value 1.03s: = 1.03s à integer value: =103
dec
= 0067
hex
Control byte:
Send 16 bit value: = 2B
hex
Load 16 bit value: = 40
hex
Telegrams:
Writing parameter data
Sending a parameter
setting to the FI:
ID 632 à 2B 6620 01 67 00
At the transmission address: 632
hex
the control byte 2B
hex
for a 16Bit
value with the value 0067
hex
(1,03s) is written in the parameter 2066
hex
(„P102 acceleration time“) in parameter set 1 Array 1 (01
hex
).
Reading parameter data
Loading a parameter
setting from the FI:
Query to the FI
ID 632 à 40 6620 01
At the transmission address: 632
hex
the control byte 40
hex
for the request
is sent to the frequency inverter to read out the saved value from the
parameter 2066
hex
("P102 acceleration time") iin parameter set 1 Array 1
(01
hex
).
Response from the FI
ID 5B2 à 4B 6620 01 6700
At the receiving address: 5B2
hex
the 16 bit value (status byte 4B
hex
) is
delivered from the parameter 2066
hex
("P102 acceleration time") into
parameter set 1 Array 1 (01
hex
) with the value of 0067
hex
(1.03s).
Pos : 181 /Anleit ungen/El ektr oni k/Buss yst eme/ 7. Beis piel- T elegramme/ - Ac ht ung - EEPR OM Schr eibz yklen @ 1\ mod_1343037906181_388.doc x @ 35917 @ @ 1
ATTENTION EEPROM writing cycles
The maximum number or write cycles on the EEPROM of the frequency inverters is limited to 100,000 cycles.
Continuous writing to the EEPROM therefore results in the destruction of the EEPROM.
Writing to the RAM of the frequency inverter should therefore be used for writing parameter data. The setting for
this is made in parameter P560 of the frequency inverter.
Pos : 182 /Anleit ungen/El ektr oni k/Buss yst eme/ 8. Zusatzinfor mationen/! Kapit el Zusatzinf or mationen @ 1\ mod_1336402432149_388. doc x @ 25883 @ 1 @ 1
Information Parameter objects
Parameters are mapped in objects above 2000
hex
!