Rockwell Automation 1901 SyncPro - Manual (Page 28)

4-2 Setup and Commissioning
1901-UM020C-EN-P – June 2013
Setup (cont.) Programmer/Display DTAM (cont.)
The DTAM will now re-attach to the SyncPro 5/03. The F()-1 and
F()-2 Macros must now be programmed into the DTAM. Perform
the following key sequences:
• [Shift][N][2][3][Shift][:][0][ENTER] – Value of N23:0 is shown
• [Shift][F()][F()][1][ENTER]
– Macro 1 Defined
• [Shift][N][2][3][Shift][:][1][ENTER] – Value of N23:1 is shown
• [Shift][F()][F()][2][ENTER]
– Macro 2 Defined
Once the above instructions are completed, place the jumper on the
plug inside the casing of the DTAM between pins 1 and 3, (or remove
the plug altogether).
R
F
1 & R
F
2 Resistor Setup
The synchronous motor field discharge resistor feedback resistors
(RF1, RF2) are necessary to attenuate the induced voltage
waveform which appears across the resistor during starting. The
resistors reduce the voltage which is seen at the terminals of the
analog/digital pulse converter to a level which is acceptable to the
optoisolators on the board. Guidelines for resistor settings are
contained in the chart shown in Table 4.A (page 4-6).
The resistance value shown is the amount of resistance which is
required on each lead which is connected to the A/D pulse board
(F1, F2). For example, if the induced voltage on the discharge
resistor is 1000 V at zero speed and 600 V at 95 % speed (across the
entire discharge resistor), then it is necessary to select taps on the
RF1 and RF2 to provide 20 kilohms at RF1 and 20 kilohms at RF2.
Discharge Resistor
F1 F2
RF RF
20 kΩ 20 kΩ
Discharge Resistor
F1 F2
RF RF
20 kΩ 20 kΩ