Rockwell Automation 1336T FORCE Series B - Manual (Page 119)

Chapter 4
Startup
4–28
The programmable relay is a normally open contact and is configured
through the Output Select parameter 384. It allows the relay to follow a
single bit within the Logic Status parameters 56 and 57. The relay can be
configured to follow the bit function or the not of the bit function. For
Example; When the motor is at set speed and you wish the contact to close,
you must enter AT SET SPEED (8). When the motor is at set speed and you
wish to have the contact open, you must enter NOT AT SET SPEED (40)
into Output Select (384).
Pulse Input Configuration:
The pulse input allows an external source to provide the drive with a digital
reference or trim signal (Fig. 4.12). It is a differential input with a maximum
frequency of 100khz. The pulse input parameters consist of PPR (395).
Scale (397), Edges (396), and Offset (398). The PPR is the number of pulses
per one revolution. The scale determines the RPM at 1 per unit (4096). The
edges are either one edge – rising edge of the pulse, or two edges – the rising
and falling edge of the pulse. Two edges provide better resolution. The
offset sets the minimum speed. For example: You have a lead drive with a
1024 PPR encoder with a base speed of 1750. The follower uses the lead
drive’s encoder but runs at half the speed. The follower’s ppr should be
1024, scale should be set to 3500, offset should be 0, and a link should be
made from external reference (101) to Pulse Value (399).
Figure 4.12.
Pulse Input Configuration
399
MOTOR CONTROL BOARD
Lead
Drive
396
EDGE
395
PPR
397
SCALE
398
OFFSET
Д
Д ДД
ДД
101
Pulse
Value Ext Speed
Ref
To calculate Scale: Follower Base Speed x
Lead RPM
Follower RPM
MOP Configuration:
The MOP function is controlled by the L Option I/O, modes 5, 9 and 15.
The MOP up and MOP down, increment and decrement the MOP value
parameter 394 based on the MOP increment parameter 393 which is in RPM
per second.
SCANport Image Configuration:
The SCANport image is a mechanism for transferring data to and from
SCANport devices. It operates the same way as a PLC image with its 1/4,
1/2, 3/4, and full racks. The SCANport image is setup by a SCANport
device such as a GD1 module or a RIO to SCANport gateway.