Baumer BA_DSRT_22DJ - Handbuch (Seite 37)

Manual_CANopen_StrainLink_EN_V3_05.doc 37/65 Baumer
22.07.11/dam Frauenfeld, Switzerland
6.3.8 Process value 24bit
Read process value 24bit (object 8130h):
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
600h + ID 8 40h 30h 81h 01h 0 0 0 0
Response from CANopen strain link:
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
580h + ID 8 47h 30h 81h 01h 80h 38h 01h 0
Byte 5 - 7:
80'38'01h 01’38'80 (LSB first) 80000
80000 / 10
Number decimal digits
(6132) + unit(6131) = 800.00 µ
ε
The process value is quoted as 24-bit Integer double complement.
The object 2112h is changing the process value from 16bit (object 7130h) to 24bit (object 8130h) and vice
versa.
Example of negative strain:
ID DLC Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8
580h + ID 8 4Bh 30h 81h 01h 80h C7h FEh 0
Byte 5 - 7:
80'C7'FEh FE’C7'80 (LSB first) -80000
-80000/10
Number decimal digits
(6132) + unit(6131) = -800.00 µ
ε
The object 8130h is read only.
6.3.9 Interrupt delta input
After the delta function is activated, when the threshold is passed the current process value is sent via PDO
and a new threshold value is set. At the next over or undercut the threshold again a PDO will be sent.
(Threshold = momentary process value +/- delta value)
t
2
*
d
e
lt
a
v
a
lu
e
A: Activation of delta function via
PDO Transmission Type
B-F: Process value is sent via PDO,
new threshold value is set
P: Process value
t: Time
B C D E F A
P
With the object 7133h (16bit) and 8133h (24bit) the interrupt delta input value can be set and read.
The delta function is activated or deactivated via the transmission type of the PDO1 (object 1800h), PDO2
(object 1801h) and PDO3 (object 1802h).