5 reduced diagnosis, 6 software limit switch – ifm electronic RN3001 User Manual
Page 17
UK
Encoder with Profibus interface
17
10.1.5 Reduced diagnosis
With older Profibus masters the full number of diagnostic bytes (standard
diagnosis: 57 bytes) may lead to problems� �
With the RM30xx and RN30xx devices it is possible to reduce the number of the
diagnostic bytes provided by the encoder to 16� If the device class "Class 1" is
selected, only 16 diagnostic bytes are provided in general�
Octet 26 bit 3
Diagnostic data length
0
Standard = 57 bytes
1
Reduced = 16 bytes
10.1.6 Software limit switch
2 positions can be programmed� If they are exceeded or not reached, the encoder
sets bit 27 in the 31-bit process actual value to "1"�
Between the two positions the bit is set to "0"� Both limit switch values can be set
to any value via parameter setting but they must not exceed the value of the [Total
measuring range] parameter� The limit switches are activated via bit 5 or 6 in octet
26�
With many projection tools it may be required to split the values into high word and low word�
Octet
27
28
29
30
31
32
33
34
Bit
31���24
23���16
15���8
7���0
31���24
23���16
15���8
7���0
Data
2
31
���2
24
2
23
���2
16
2
15
���2
8
2
7
���2
0
2
31
���2
24
2
23
���2
16
2
15
���2
8
2
7
���2
0
Lower limit switch in measuring steps (referred to scaled value)
Octet 26 bit 5
Lower limit switch
0
Off
1
On
Octet 26 bit 6
Upper limit switch
0
Off
1
On