Technical data

Index Protocols and Communication Data List
B-14
P/N 7135049A
E 2007 Nordson Corporation
VBC_Siemens
Channel Number
The master has to determine a channel number that is valid e.g. for a
temperature channel, pressure channel or motor.
Beginning with the determined channel number as starting channel, the
command to read data for six sequential channels is executed.
The range of channel numbers extends from 0 to 18. Channel number set to
”0” (zero) is interpreted as No channel number.
If the Acknowledge channel number of the receive data block is identical
with the transmitted channel number, the job is completed.
NOTE: Channel number ”0” is used for general melter data, e.g. program
versions.
Write Data Value
In Write data value the master writes the data values for the settings in the
Nordson melter.
NOTE: The communication data is transmitted in Intel format, i. e. the low
byte of a word is placed on the lowest address and the high byte on the
highest address. The master may need to switch bytes, if the formats of the
master and the Nordson melter do not agree.
Example 1
The master writes a data value of 25 minutes for the parameter System
ready delay time {9}.
Transmission data:
Data index Channel number Write data value
9 0 25
dez
(25 min)
Example 2
The master writes a data value of 31.5
-1
for the parameter Speed setpoint in
manual mode {32} for motor 1.
Transmission data:
Data index Channel number Write data value
32 1 315
dez
(31.5 min
-1
)
Transmission data with decimal places, such as parameters and setpoints,
must be multiplied by 10 for transmission.