Rockwell Automation 1794-ID2 U.MNL INCREMENTAL ENCODER - Manual (Page 70)

6–8 Input, Output and Configuration Files for Analog Modules when used with ControlNet
Publication 1794ĆUM015B-EN-P - May 2001
Output
Word
Bit
Definition
Word 0 Channel 0 Control Word - Control word for setting the function of counter 0.
Bits 00-02 02 01 00 Mode Selection bits
0 0 0 Counting on positive (rising) edge of input signal A. (Up/dwn counting determined by B.)
0 0 1 Quadrature encoder X1
0 1 0 Quadrature encoder X2
0 1 1 Quadrature encoder X4
1 0 0 Counting up on the positive edge of input signal A, and down on positive edge of input signal B.
1 0 1 No count function.
1 1 0 No count function.
1 1 1 No count function.
Bit 03 Preset(Reset) bit- A positive edge on this bit moves the value in Preset X to Counter X, independent of Preset
Enable. NOTE: To use Preset as Reset, use a count value of 0000 in the Preset value word.
Bit 04 Enable Z Presetbit- When this bit is set (1), a positive edge on Z preloads Counter X = Preset X, independent of
Cal Enable. NOTE: If Z is configured to do Store and Preset (Reset), the Store will occur first.
Bit 05 CountEnable bit- When this is set (1), the pulse counter is enabled.
Bits 06-08
(06 10)
Calibration Control bits - bits 06, 07 and 08
(06-10)
06 Enable bit- When this bit is set (1), the counter can be calibrated.
07 Direction bit - When this bit set (1), calibration is performed in a negative direction; when reset (0),
calibration is performed in a positive direction.
08 Resetbit- Calibration is acknowledged and a new calibration is enabled on a positive edge on this bit.
Bits 09-10
(11 12)
10 09 Gate Control bits
(11-12)
0 0 No gate function on input G
0 1 Counting only if G is high (active)
1 0 Counting only if G is low (inactive)
1 1 The counter can be calibrated when G is high (active).
Bits 11-12
(13-14)
12 11 Store Control bits - These bits will trigger a Store only if the channel Store status bit (L0 or L1) is
cleared (0).
0 0 Save the counter value on the positive edge of Z (if Stored X = 0)
0 1 Save the counter value on the positive edge of G (if Stored X = 0)
1 0 Save the counter value on the negative edge of G (if Stored X = 0)
1 1 Save the counter value on the positive edge and negative edge of G (if Stored X = 0)
Bit 13 (15) Rollover bit- When set (1), the counter counts up to the preset and then restarts at 0. If this bit is reset (0) (not
rollover), the rollover preset value = FFFF (hex = 65535 (decimal).
Bit 14 (16) Store Resetbit- A positive edge on this bit resets Store X in Signals.
Bit 15 (17) PresetResetbit- A positive edge on this bit resets Preset Reached in Signals.