Rockwell Automation 20-COMM-Q ControlNet Adapter User Manual
Page 163
Using Explicit Messaging
6-35
20-COMM-C/Q ControlNet Adapter User Manual
Publication 20COMM-UM003F-EN-P
PLC-5 Controller Example Ladder Logic Program to Write Multiple
Parameters
A Generic Bi-Directional scattered write message is used to write to
multiple parameters. This write message example writes the following
values to these five parameters.
See
DPI Parameter Object on page C-16
(Class code 0x93) or
(Class code 0x9F) for parameter
numbering.
Important: See
Table 6.A on page 6-2
for limitations of PowerFlex 7-Class
and PowerFlex 750-Series drives when using DPI Parameter
Object Class code 0x93 or Host DPI Parameter Object Class
code 0x9F for explicit messaging.
Figure 6.43 Example Ladder Logic to Write Multiple Parameters
Important: If the explicit message scattered write must be written
continuously, then use a separate Generic Set service explicit
message single write for each parameter using DPI Parameter
Object Class code 0x93 or Host DPI Parameter Object Class
code 0x9F and attribute A (see
). Attribute A writes to
RAM—not NVS (EEPROM) memory. This example scattered
write message writes to NVS. Over time, continuous writes will
exceed the EEPROM life cycle and cause the drive to
malfunction.
PowerFlex 7-Class
Drive Parameter
Write Value
PowerFlex 750-Series
Drive Parameter
Write Value
141 - [Accel Time 2]
11.1 Sec.
536 - [Accel Time 2]
11.1 Sec.
143 - [Decel Time 2]
22.2 Sec.
538 - [Decel Time 2]
22.2 Sec.
105 - [Preset Speed 5]
33.3 Hz.
725 - [Zero Position]
33
106 - [Preset Speed 6]
44.4 Hz.
21555 - [Port 5: Analog In0 Hi]
5.5
107 - [Preset Speed 7]
55.5 Hz.
780 - [PTP Setpoint]
-75,555