FEC AFC1200 User Manual

Page 27

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4.7.7 Signal Timing Chart

A. Basic Control Signals - ISA Main Unit and Axis Unit

ISA MAIN UNIT SIGNALS

STOP

READY

RESET

START

FASTENING

BUSY

ABNORMAL

AXIS UNIT SIGNALS

AXIS 2

BYPASS

AXIS 2

BYPASS

AXIS 1 ACCEPT

AXIS 1 REJECT

AXIS 2 ACCEPT

(INPUT)

(OUTPUT)

5 0 M S E C

REJECT

FIG. 4-7-7a Basic Control Signals - ISA Main Unit and Axis Unit

P Because the RESET input clears all fastening data, discrete outputs, and

communication buffers, it should be activated only to clear a System Abnormal or
to perform a required Zero Check. The System will automatically reset with each
fastening, and a Manual RESET activation between cycles could result in data loss.
The RESET signal requires a pulse of 200~500 milliseconds.

P The STOP input is Normally Closed, and enables all other functions. When STOP

is Open, all operations cease and all inputs and outputs become inactive.

P The READY signal enables Main Unit inputs and allows System operation.

P The START signal will not operate during RESET, REVERSE, OFFSET CHECK,

SELF-CHECK, or ABNORMAL signal activation. The START signal requires a
pulse of 200~500 milliseconds.

P When the ABNORMAL signal is active, all other signals are disregarded. RESET

is an exception, because RESET must be input to clear an Abnormal output.

P REJECT, ACCEPT, ABNORMAL, READY, and BUSY output signals must be

interlocked with BANK 1 and activated only when BANK 1 (Main) is selected.

P When a BYPASS signal is input to the Axis Unit from the PLC, the Axis Unit will

return a BYPASS output signal as a confirmation. When making the final fastening
judgment, the Main Controller does not consider the status of Axis Units set to IN
BYPASS. Axis Units should be monitored to ensure that all required spindles are
functioning, and that none have been bypassed in error. The PLC can be
programmed to output a message whenever an "active" spindle has been set to IN
BYPASS, or the equipment operator can visually monitor each Axis Unit.

Chapter 4: System Setup and Wiring

Page 4-27