Parameter Channel - Roland R1000 Series Manual

Communication with the PLC
6.4

Parameter channel

The parameter channel is designed to exchange systems and parameter data of the R1000 with
the master. Primary purpose is the central data backup on the master. In addition, certain
measurement and operating parameters can be extracted from the R1000 and analyzed by the
master.
The data transmission via the parameter channel must be initiated with the service "Open
parameter channel". The end of data transmission mission via the parameter channel must be
completed with the service "Close parameter channel".
If the parameter channel is open then it is not possible to issue control commands via the process
channel or via inputs on the keyboard.
6.4.1 Structure of the parameter channel
Meaning
Byte
Management
Program index
Parameter index
Application data byte 0
Application data byte 1
Application data byte 2
Application data byte 3
Checksum
Data access control
Services are initiated exclusively by the master. The R1000 as slave cannot initiate data
transmissions.
The management byte (I0) is used by the master to select the service (for example writing or
reading) and to confirm the access. The R1000 confirms via the management byte (O0) the
execution of the command. If an access is not allowed and therefore, the service cannot be
executed, then the R1000 declares this action a collision.
ROLAND ELECTRONIC GmbH · Otto-Maurer-Str. 17 · DE 75210 Keltern · Phone +49 (0)7236-9392-0 · Fax +49 (0)7236-9392-33
86
Double Sheet Detector R1000 series UDK20
with integrated fieldbus interface
Note The configuration of the data format has to be compatible with the
PLC for consistent data transmission!
Structure of the parameter channel
I/O Byte
0 1 2 3 4
x
x
x
x
x
Manual
Notes
5 6 7
Data access control (reading, writing, handshake)
Selection of the tooling program
Selection of the parameter
MSB (most significant byte)
LSB (least significant byte)
x
x
x Checksum of the transferred bytes 1 - 6
B0048191 / Rev. 1.5