
Depending on the telegram type, here up to 12 byte user data can be found.
3.27.7.2
Telegram types
By specifying the
Telegram type
the content of the responded data is defined. The fol-
lowing telegram types are available:
Type
Designation
Page
0x00
‘Zero Frame’
: Accessing
Frame 0
0x01
‘Read Value’
: Read the measured value of a measurand
0x02
‘Read Frame’
: Read a previously defined data package
(Frame)
0x03
‘Set Frame’
: Define the data areas of a data package (Frame)
0x04
‘CMD Frame’
: Send a command
3.27.7.2.1
Zero Frame
This telegram type is the same as the telegram type
‘Read Frame’
applied at
Frame 0
.
After the start-up of the module there are automatic
Zero Frame
requests as long as the
process data communication comes from the head module.
3.27.7.2.2
Read Value
With
‘Read Value’
all the measured values can be requested.
Request
Byte
Value
Description
B0
0x10
n
Bit 3 ... 0: Error code (not relevant)
n
Bit 6 ... 4: 001 Telegram type
‘Read Value’
n
Bit 7: 0 fix reserved
B1
?
n
B2
0x?0
n
Length user data: 0
n
of the measured value to be read
B3
0x00
n
Common status (not relevant)
D00
-
n
User data (not relevant)
...
D11
User data
Telegram types
VIPA System SLIO
Analog Input
031-1PA00 - AI1x 3Ph 230/400V 1A > Process data communication
HB300 | SM-AIO | | en | 17-05
321