WOODWARD 8446-1019 505 Digital Governor

WOODWARD 8446-1019   505 Digital Governor

8446-1019 Technical Specifications
Dimensions 358.8 mm X 59.2 mm X 220.1 mm
Droop 0 – 12% speed reduction.
Humidity Tested at 95%, not condensing
Load Sharing Input 0-3 Vdc
Manufacturer Woodward
Power Supply 18-36 Vdc
Sync Input Compatible with Woodward SPM-A synchronizer

505E Software Changes Covered in this Manual Revision
1.8446-1019 PROGRAM MODE: Made all start modes default to false to ensure a customer programmed the unit. Also added an error check to ensure Rated Speed (when programmed as a gen set) was less than max gov.
2. SERVICE MODE: Changed the hold changes for Min Load to come from the Breaker Logic header’s Hold Changes input. Previously the hold changes
command was selected under the Speed Control Settings header.
3. SPEED SETPOINT RATES: Changed the minimum adjustment range for all speed setpoint rates to 0.01 (was 0.1).
4. AUX LIMITER or CONTROLLER: Added logic to ensure the inhibited status of Aux control when the input is failed. In addition, changed Aux re-enable logic such that when a failed aux input is restored there is no glitch to the speed LSS. Also changed breaker open logic to correct a Gen Opening Aux actuator output glitch.
5. 8446-1019 AUX CONTROLLER: Changed the speed setpoint aux biasing logic to only allow the speed control limiting action (while in aux control) to be active when the speed setpoint reaches max gov. Prior to this fix the speed limiter could come into control during an extreme transient.
6. AUX DIRECT ENTERED SETPT: Changed Aux Entered setpoint to be reset/ stopped on a shutdown pulse rather than held disabled on a shutdown condition. This change allows the Aux Limiter function direct setpoint entry even when the unit is tripped.
7. AUX, CASC, and EXTR DROOP: Changed the droop feedback lag-tau tunable range from a max of 10 to a max of 1000.
8. DECOUPLED CASCADE CONTROL: Added a lag to the speed the speed setpoint is using during a utility tie breaker open setback. Also updated the logic used to reset the speed setpoint to minimize to bump experienced when Decoupled Casc is disabled. Changed logic to fix a problem where breaker opening while in the Cascade decoupled mode would cause the HP valve to close then open unexpectedly.
9. MODBUS: Changed the Gen and Tie Open alarms for Aux, Casc, and Remote to match the Modbus®
* listing—the software eventlatch inputs were reversed/backwards with the Modbus listing.
*—Modbus is a trademark of Modicon, Inc.
10. CONTROLLED STOP: Made the Controlled Stop abort if speed raise/lower
is selected or another control mode is selected. This can be tuned-out by
setting CNTRL_STOP.RL_STOP. IN_2=*false in the debug mode.

8446-1019  Electrostatic Discharge Awareness
All electronic equipment is static-sensitive, some components more than others.
To protect these components from static damage, you must take special
precautions to minimize or eliminate electrostatic discharges.
Follow these precautions when working with or near the control.
1. Before doing maintenance on the electronic control, discharge the static
electricity on your body to ground by touching and holding a grounded metal
object (pipes, cabinets, equipment, etc.).
2. 9907-165 Avoid the build-up of static electricity on your body by not wearing clothing
made of synthetic materials. Wear cotton or cotton-blend materials as much
as possible because these do not store static electric charges as much as
synthetics.
3. Keep plastic, vinyl, and Styrofoam materials (such as plastic or Styrofoam
cups, cup holders, cigarette packages, cellophane wrappers, vinyl books or
folders, plastic bottles, and plastic ash trays) away from the control, the
modules, and the work a

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WOODWARD TG-13（8516-038）
WOODWARD EGCP-3 8406-113
WOODWARD EASYGEN-3500-5/P2 8440-2145
WOODWARD 9907-838
WOODWARD 9907-252
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WOODWARD 9907-165
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WOODWARD 9907-162
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WOODWARD 8446-1019
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WOODWARD 8444-1019F
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WOODWARD 9905-726
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WOODWARD 9671-810
WOODWARD 9561-810
WOODWARD 9563-810
WOODWARD 8237-1246
WOODWARD 8273-126
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WOODWARD 8440-2165