14
VAC-SIF-05
Training & Maintenance Manual
CVX0260B
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatic
Poll Command and Digital Outputs
The unit has four (4) outputs. The outputs are bitmapped to
the lower nibble of the byte. The outputs are turned ON by
sending a “1” to their respective bits, and they are turned OFF
by sending a “0” to their respective bits. The following are the
polled data bytes to actuate the four outputs:
Polled Command Date
Action
0x01
Turns ON Channel 1 Vacuum
0x02
Turns ON Channel 1 Blow-off
0x04
Turns ON Channel 2 Vacuum
0x08
Turns ON Channel 2 Blow-off
Poll Response and Digital Inputs
Inputs indicate that a part is present on either of the two (2)
channels. The inputs are bit mapped to the lower nibble of the
byte in the polled response. The following are the feedback
signal meanings for the two (2) inputs:
Polled Response Date Interpretation
0x01 Channel 1, Part Present
0x02 Channel 2, Part Present
Explicit Messaging and Digital Outputs
The outputs are accessed through the Discrete Output Point
Object, Class Code 0x09.
Output
Instance No.
Attribute
Vacuum 1
1
3
Blow-off 1
2
3
Vacuum 2
3
3
Blow-off 2
4
3
Explicit Messaging and Digital Inputs
The inputs are also accessed through the Discrete Input
Object, Class Code 0x08, with Explicit messaging.
Input Instance No. Attribute Explicit
Response
Channel 1, Part Present
1
3
0x01
Channel 2, Part Present
2
3
0x01
Change of State Messaging
In this mode of messaging, date is sent to the Master when
the Slave device inputs change. These device inputs are the
two-part present indications. Change of State messaging can
send acknowledged or unacknowledged date.
For acknowledged date, the Acknowledge Timer in the
Acknowledge Handler Object (Class Code 0x2B, Attribute 1)
sets the time to wait before resending the data. The range of
values for this attribute is 1 to 65,635ms. Zero is invalid. The
default value is 16ms.
A Slave can be allocated for Cyclic or Change of State but
not both. Change of State can function with Bit-Strobed and
Polled messaging.
General Description
The Convum Vacuum Generator operates as a Group II Only
slave on the DeviceNet™ network. The unit supports the
following types of messaging: Explicit, Polled, Cyclic, Change
of State, and Bit Strode. It does not support the Explicit
Unconnected Message Manager (UCMM).
The Cyclic, Change of State, and Bit Strobe types of
messaging were incorporated into the product beginning with
Firmware Revision No 4.23 or later. This can be verified by the
label on the microcontroller on the p.c. board.
The unit has four (4) digital outputs and two (2) digital inputs.
The digital outputs control two (2) vacuum states and two (2)
blow-off states. The two (2) digital inputs are two-part present
indications (one for each channel) and an auxiliary power
voltage indicator.
The DeviceNet™ power bus supplies power for the
DeviceNet™ circuitry and the two (2) Convum
sensors. The
auxiliary power bus provides power for the vacuum solenoids,
the blow-off solenoids, and the solenoid for the Emergency
Stop circuit. The following are the power requirements for the
DeviceNet™ circuitry.
Voltage Range .12.5 to 24VDC
Current ..........................150Ma
The following is the product information for the DeviceNet™
interface:
Vendor ID (VendCode) ......510
Device Type (ProdType).........7
Product Code (ProdCode) .....1
Bytes Produced (polled) ........1
Bytes Consumed (polled) ......1
The following are the power requirements for the circuitry on
the auxiliary power bus:
Voltage Range ............. 24VDC
Current ................. 400Ma max.
MAC ID Settings
The MAC ID is set with the lowest six (6) positions on the 8-Pin
DIP switch located on the p.c. board. The least significant digit
of the setting is on position 1 and the most significant digit is
on position 6. To have a switch be read as a “1”, set it to the
“ON” position. To have the switch be read as a “0”, set it to the
“OFF” position.
Baud Rate Settings
The baud rate is set with the two highest positions on the
8-Pin DIP switch. The lower digit is position 7 and the higher
digit is position 8. To have a switch be read as a “1”, set it to
the “ON” position. To have the switch be read as a “0”, set it to
the “OFF” position. The following are the DIP switch settings
for the baud rate:
Switch Settings (8 and 7) Baud Rate
00
125k
01
250k
10
500k
11
Invalid
DeviceNet™ Information
