68
ICC
Speed Actual: Inverter operating speed in RPM. Maps to inverter register
1301 (output frequency). Because the inverter always provides its output
frequency in units of Hz, the interface card applies a Hz-to-RPM conversion
equation. The general Hz-to-RPM conversion equation is [
output frequency x
120 / number of motor poles
]. However, for simplicity the interface card always
assumes that a 4-pole motor is in use, thereby reducing the applied conversion
equation to [
RPM = output frequency value x 30
].
13.2.3
ControlLogix Examples: Setup
This section will demonstrate how to initially setup a ControlLogix PLC (such as
a 1756-L61) coupled with a 1756-ENBT communications bridge (adjust this
procedure according to your specific equipment). Later sections will provide
specific read/write examples using this configuration with I/O or explicit
messaging.
1) Run RSLogix 5000, and create a new configuration.
2) To add a 1756-ENET/B to your I/O configuration, first switch to offline
mode.
3) Right click on the I/O Configuration node in the controller organizer view
and choose “New Module…”
4) The “Select Module” window will open.
5) Under “Communications”, select “1756-ENET/B”, and click OK. Refer to
Figure 63.
Figure 63: Adding a New Module
6) The “New Module” window will open. Refer to Figure 64.
