Westlock Controls Corporation Intellis 7604, Installation And Operation Manual

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1.4.1 Module Bit Map
Table 1
I/O TYPE MODULE REFERENCE
BITMAP OF DATA
INSTANCE #4 (8-POINT INPUT WITH
NO STATUS) ATTRIBUTE #3 (DATA)
INPUT 0 Hall Effect Internal Sensor
BYTE 0, BIT 0 Valve Closed
(Bottom L.S.)
INPUT 1 Hall Effect Internal Sensor
BYTE 0, BIT 1 Valve Open
(Top L.S.)
INPUT 2 Active High/Low* J2-1 (In Hi/Low) to J2-2 (Ground) BYTE 0 BIT 2 Aux. Input
INPUT 3 Active High/Low* J2-3 (In Hi/Low) to J2-4 (Ground) BYTE 0, BIT 3 Aux. Input
*Active High/Low indicates that pulling the input pin up to +U or down to ground activates the input.
I/O TYPE MODULE REFERENCE
BITMAP OF DATA
INSTANCE #33 (STATIC OUTPUT)
ATTRIBUTE #3 (DATA)
OUTPUT 0 Active Low* J4-1 (+24V) to J4-2 (Out) BYTE 0, BIT 0 “A” Solenoid
OUTPUT 1 Active Low* J4-3 (+24V) to J4-4 (Out)
BYTE 0, BIT 1 “B” Solenoid or
Aux. Output
*Active Low indicates that when the output is activated it pulls the pin down to GND drawing current through the load from the +24V
1.4.2 Watchdog Timer
The DeviceNet Connection Object (Class Code 05) of the DPAC firmware has an
integral inactivity/watchdog timer (IWT). The behavior of the IWT is defined by the
DeviceNet Specification.
There are two types of message connections, Explicit and I/O, each with their own IWT.
There are also different configurable attributes that effect device behavior in the event of
an IWT timeout.
The initial timeout value is the
expected_packet_rate attribute multiplied by 4 or by 10
seconds, which ever is greater (Configuring state). All subsequent activations of the IWT
use the
expected_packet_rate attribute multiplied by 4 as the number of milliseconds to
load into the IWT (Established state).
The default configuration of the DPAC will cause the outputs of the DPAC to go to
the de-energized state when either IWT times out.
The IWT attribute for the Explicit message connection is configurable via explicit
messaging. There are two values for this attribute supported by the DPAC; Auto Delete
(the factory default setting) and Deferred Delete. Refer to Table 2 for definitions of these
values and refer to Appendix B for the Device Specification to obtain Class, Instance,
Attribute codes for explicit messaging the device.
The DeviceNet Discrete Output Point Object (Class Code 09) controls the behavior of the
DPAC outputs. There are four attributes that specify the behavior of the device when
either a Fault state (IWT timeout) or Idle state (Poll message without data) is entered. The
DPAC may be configured to execute the Fault Value, outputs “ON” or “OFF”, or to keep
at last value. Refer to Appendix B for the Device Specification for additional
information.
Tech-309 1-4