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Power (Green) LED State
Always Off
Always On
1 short blink every interval
2 short blinks every interval
3 short blinks every interval
4 short blinks every interval
Steady medium blink
Steady fast blink
A red LED, normally off, indicates a Lockout State when lit.
Motor (Amber) LED State
Always Off
On
1 short blink every interval.
2 short blinks every interval.
3 short blinks every interval.
4 short blinks every interval
Medium speed blink.
a
The four amber motor LED provide status for the individual ML7999 Actuators; e.g., Motor 1 LED is Air Actuator Status, Motor 2
LED is Fuel 1 Actuator Status, Motor 3 LED is Fuel 2 Status, and Motor 4 LED is FGR Actuator Status.
Manual Operation
Place the R7999 in a manual firing rate condition by applying
line voltage to terminal 4. The R7999 will drive to the desired
firing rate control position by the value of the resistance set at
terminal 36/38. A 200-Ohm value equals minimum modulation;
4500 ohms equals maximum modulation. Linear interpolation
exists for all other values.
Commissioning Process
The primary tasks to be accomplished by the commissioning
process are as follows:
1. Establish the endpoints of each actuator within the
system.
2. Establish the purge position.
3. Establish the lightoff position.
4. Establish minimum and maximum modulation positions.
5. Establish a fuel, air, FGR mixture profile for up to 20
points between the minimum and maximum modulation
points for each fuel source within the system.
The commissioning process requires either the S7999
touchscreen display, or the use of the ZM7999 ControLinks™
Commissioning Software running on a laptop or PC with a
minimum operating system of Windows 95. Additional
minimum requirements include a Pentium® class processor, or
equivalent, with 16megabytes of RAM and a one gigabyte hard
Table 4. R7999 Status LED Blink Patterns.
Control has failed, or has no power.
Control cannot run or communicate until a critical fault has been corrected. This state occurs at
each power up or reset. Control is in the Initiate State or Alarm Initiate State or Alarm Hold State.
Check that only one fuel has been selected, or that HF and LF are not active at the same time. If
HF and LF are active at the same time, the red LED will also be on.
Control is in Postpurge or Standby State.
Control is in a low voltage condition.
Control is in the non-configured state.
Control is in the commissioning state.
Control is in the Run State.
Control is in manual mode.
Table 5. R7999 Channel Status LED Blink Patterns.
a
Actuator is not being commanded to move or is not configured.
Actuator is in motion.
Actuator Failure: Failed timing plausibility check.
Actuator Failure: Failed actuator ID process.
Actuator Failure: Analog/Digital reading of potentiometer out of range.
Actuator Failure: Potentiometer failure—wiper resistance.
Actuator Warning: Wiper resistance high.
R7999A,B CONTROLINKS™ CONTROLLER
Meaning
Meaning
drive with 100 megabytes of free hard drive memory. The PC
or laptop must have a serial or USB port. If using a serial port,
an RS232-to-RS485 converter (like the QM4520) is required to
communicate with the R7999. Shielded cable is recommended
as interface wiring.
If using a USB port, a Keyspan® or Belkin® USB to RS-485
converter is recommended.
The R7999 requires the presence of one of the Fuel Select
inputs to start communications with the ZM7999 ControLinks™
Commissioning Software. Additional wiring interface
requirements include that HF and LF command inputs cannot
be activated at the same time.
NOTE: A stack gas analyzer is required to commission
the ControLinks™ Control System.
Table 6. RS-485 to R7999 Hookup Data.
RS-485
Data+
Data-
Ground
Figs. 4 and 6 provide a standard block hookup diagram for the
R7999 and associated equipment.
7
Connects to R7999
A
B
C
65-0238—10
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