Rockwell Automation GV3000/SE AC Drive AutoMax Network Communication Board, M/N 2AX3000 - Manual (Page 58)

Programming 4-1
C
HAPTER
4
Programming
This section describes the organization of data in the AutoMax Network Option Board
and how the network accesses the data.
4.1 The Network and Other Control Sources
You can use the front panel keypad/display to change parameter values when the
Control Source parameter (P.000) is set to 2 (OP). However, if the tune/config input
enable bit (Drop_1, register 32, bit 14) is on, any changes made through the keypad
might be overwritten when the next network update occurs.
4.2 Network Transfer Rates
To write data to the drive, the Network Option board must be communicating with the
master and the Control Source parameter (P.000) must be set to 2 (OP).
Data transfer rates between the AutoMax Network Option Board and Regulator board
depend on whether input or output data are being transferred.
Input data is one of three types:
• Control/Reference: This is data that requires the fastest update rates. This
includes data such as the sequencing inputs (Stop, Run, Jog, Fwd/Rev) and
speed/torque reference. These inputs are transferred every speed loop scan period
(every 5ms), or as required by the drive. For example, if the drive is configured to
obtain its torque reference from the option port, it will read this data from the option
port every torque loop control scan (512
µ
s).
• Tunable: This is data that can be changed while the drive is running or stopped.
Tunable data includes parameters such as Accel Time 2 (RAMP 2) (P.017) and
Overfrequency Limit (H.022). Tunable inputs are transferred approximately every
350 ms when the tune/config input enable bit (Drop_1, register 32, bit 14) is on.
• Configurable: This is data that cannot be changed while the drive is running.
Configurable data includes parameters such as Terminal Strip Speed Reference
Source (P.008) and Motor Nameplate Base Frequency (H.001). Configurable inputs
are transferred from the Network Option board to the Regulator board approximately
every 350 ms while the drive is stopped and the tune/config input enable bit (Drop_1,
register 32, bit 14) is on. Values sent from the network master while the drive is
running are stored in the Network Option board but are not sent to the Regulator
board until the drive is stopped.