Technical data

Index Protocols and Communication Data List
B-19
P/N 7135049A
E 2007 Nordson Corporation
VBC_Siemens
Example of Startup with Standard Index Protocol
For indexes and bit positions, refer to Communication Data List.
1. Set the main switch to I/ON.
NOTE: The control unit needs some time to boot after the melter is
switched on. No data can be exchanged via the field bus during this time.
2. With Profibus: Set the field bus address on the control panel. Other field
buses: Set the address on the gateway.
3. Select control mode Field bus or Dual on the control panel.
4. Set the general melter data as well as limits and setpoints for all of the
motors, temperature channels and pressure sensors.
Example
a. Set Heaters ON (Melter Control, bit 0)
b. Enable motors #1 and #2 (Melter Control, bit 2, bit 3)
c. If the motors are to operate in key-to-line, set Key-to-line mode (for
all motors) (Melter Control, bit 7)
d. Set the temperature setpoint {115} for channel number 4 to 180 °C
e. Set Command to 6 (The master wishes to write data to the Nordson
melter)
f. Set the line speed signal for motor #1 to 20.4 min
-1
and for motor #2
to 32.6 min
-1
.
Transmission data block:
Melter control
Bit Position
Command Data index Channel
number
Write data
value
Line speed value for
motor
7 6 5 4 3 2 1 0 1 2 3 4
1 0 0 0 1 1 0 1 6 115 4 180 204 326 ... ...
Bit 0 Heaters ON/OFF is edge-controlled. To switch on, 0 −> 1 (rising edge)
Bit 7 Key-to-line is edge-controlled. To switch on, 0 −> 1 (rising edge)
S Check the Acknowledge data of the receive data block (replay from the
Nordson melter): If the Acknowledge data is identical to the transmitted
data index and the channel number, the job (Command = 6) is
completed.