Kollmorgen BDS5, Инструкция по установке и настройке, Страница: 83 / 150

BDS5 C
HAPTER
5 - T
ROUBLESHOOTING
5-5
5.5 ENABLE AND FAULT LOGIC
This section of this chapter discusses how the BDS5
is enabled and disabled. This discussion will center
around Drawing A-84732 "BDS5--ENABLE and
FAULT LOGIC DIAGRAM." This drawing has six
areas, each of which is labeled with an encircled
number, 1-6. Note that this drawing is a functional
diagram; it does not directly represent the actual
hardware and software used to implement these
functions.
5.5.1 Firmware Faults, Area 1
Area 1 shows how firmware faults are combined.
Firmware faults are the most serious errors. They
include checksums (to help verify computer memory),
watchdogs (to help verify that the computer is
running properly), and the 5-volt logic power supply
monitor.
These circuits are designed to watch the basic
operation of the microprocessor. They do not
generate error messages because the detected fault
affects the microprocessor directly. Instead, they just
blink the Central Processing Unit (CPU) LED.
As shown on Drawing A-84732, firmware faults set a
latch to turn off communications and blink the CPU
LED. The CPU LED blinks in cycles consisting of 2
to 8 blinks and a pause. The number of blinks
corresponds to the error number, which you can look
up in Appendix C. The only way to reset these faults
is to power-down the BDS5. These faults are serious
and you should consult the factory if they occur. Do
not confuse these faults with autobauding on power-
up. When autobauding, the CPU LED blinks at a
constant rate, about three times per second. The
autobaud mode is described in the User’s Manual.
5.5.2 Fault Logic, Area 2
The large OR gate in Area 2 combines three types of
faults: hardware, software, and firmware. The
circuits that generate these faults are typical of motor
controllers and are listed on the drawing. These
faults are errors that are serious enough to disable the
BDS5, as described in Appendix C.
5.5.3 Fault Latch, Area 3
The latch in Area 3 turns on the FAULT LED, the
FAULT software switch, and the FAULT output on
Connector C8. Any fault sets this latch; you can also
write your program to turn it on if you detect a fault
condition. The fault latch can be reset by:
1. Turning FAULT off,
2. Typing the enable command (EN), or
3. Powering down the BDS5.
5.5.4 Ready Latch, Area 4
Area 4 shows the logic required to make the drive
ready. If there are no faults, the EN command sets
the ready latch. This turns the READY software
switch on. This latch is reset with the Kill (K)
command, the Disable (DIS) command, or a fault.
These turn READY off.
5.5.5 ACTIVE, Area 5
Area 5 shows that ACTIVE will be on if both
READY and REMOTE are on. This turns on the
ACTIVE LED. It also allows the BDS5 to actively
control the motor.
REMOTE (Remote Enable) is an isolated input that is
accessed from Connector C2 on the front of the drive.
You can print REMOTE with the P command. It
must be 1 to activate the BDS5. Note that some
faults "hide" the value of the REMOTE input from
the BDS5 microprocessor. This does not normally
matter because all faults must be cleared before the
drive will enable. If this condition exists, the BDS5
will print REMOTE as "-1".
5.5.6 Relay and STATUS Control,
Area 6
Area 6 shows how software switch STATUS and the
relay work. You can configure STATUS to indicate
either drive READY (but not necessarily ACTIVE)
or drive ACTIVE. The difference is in how you want
to use STATUS. STATUS can be used for an
interlock. In this case, you want STATUS to indicate
drive ACTIVE. If the BDS5 becomes inactive for
any reason (including the REMOTE input turning
off), then STATUS will turn off. As an alternative,