Parker Hannifin
134 Programmer’s Guide
Field Description
Read/
Write
Description
Number of Digital
Output Bytes
R
The total number of bytes (1 byte = 8
bits) taken for digital outputs on the
network.
Number of Analog
inputs
R
The total number of analog inputs on
the network.
Number of Analog
Outputs
R
The total number of analog outputs on
the network.
Bus State
R
Indicates the current bus state. See
the next page for more detail on what
this value means.
The CANopen STATUS LED table below gives the possible LED
indicator states and the corresponding CAN state and controller.
The only normal states are “PRE-OPERATIONAL” and “OPERATIONAL”.
Any red in the CAN LED indicates a problem. All states listed below
are consistent with CiA DR-303-3 “Indicator Specification”, although
not all possible states listed in that document can occur in the
ACR9000. In addition, the ”off” and “blinking red” indications are
unique to the ACR9000, not included and not conflicting with the
states listed in CiA DR-303-3 “Indicator Specification”.
The CANopen status LED is located just below the CANopen
connector on the ACR9000.
CANopen STATUS
LED
CiA DR 303-3
CAN state
Description
Possible
ACR9000
state(s)
OFF
N/A
No CAN controller
detected
0
Blinking Green
Pre-
Operational
CANopen is in the pre-
operational state.
1,3,4,5
Solid Green
Operational
The network is now
exchanging data
2
One Red blink
inside blinking
Green
Warning limit
reached
At least one of the error
counters of the CAN
controller chip has
reached or exceeded the
warning level (too many
error frames)
6
Two Red blinks
inside blinking
Green
Error control
event (Health
event)
A guard event or
heartbeat event has
occurred.
7
Solid Red
Bus Off
The CAN controller is bus
off
10
Blinking Red
N/A
ACR internal error or
transmission overrun
8,9
