R7999C CONTROLINKS™ CONTROLLER
32-00081EF—01
8
Table 5. R7999C Channel Status LED Blink Patterns.
a
The four amber motor LED provide status for the individual ML7999C 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 R7999C in a manual firing rate condition by
applying line voltage to terminal 4. The R7999C 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 posi-
tions.
5.
Establish a fuel, air, FGR mixture profile for up to 20
points between the minimum and maximum modula-
tion 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 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 R7999C. Shielded cable is recommended as
interface wiring.
If using a USB port, a Keyspan® or Belkin® USB to RS-485
converter is recommended.
The R7999C 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 R7999C Hookup Data.
Figs. 4 and 6 provide a standard block hookup diagram for
the R7999C and associated equipment.
Motor (Amber) LED State
a
Meaning
Always Off
Actuator is not being commanded to move or is not configured.
On
Actuator is in motion.
1 short blink every interval.
Actuator Failure: Failed timing plausibility check.
2 short blinks every interval.
Actuator Failure: Failed actuator ID process.
3 short blinks every interval.
Actuator Failure: Analog/Digital reading of potentiometer out of range.
4 short blinks every interval
Actuator Failure: Potentiometer failure—wiper resistance.
Medium speed blink.
Actuator Warning: Wiper resistance high.
RS-485
Connects to R7999C
Data+
A
Data-
B
Ground
C
