Watlow Controller Series D8, Руководство пользователя

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D8 Series User’s Guide
Chapter 3: Communicating by DeviceNet
50
Table 3.11
– Assembly Class and Services
Class Code
04 hex
Class Services None
Instance Services
0E hex Get Attribute Single
10 hex Set Attribute Single
Table 3.12
–
Assembly Instance Attributes
INSTANCE ATTRIBUTE ACCESS NAME TYPE DESCRIPTION
100 (64 hex) 3 (3 hex) Get/Set Set Points array
1
of INTs Set Point of each loop
101 (65 hex) 3 (3 hex) Get/Set Modes array
1
of USINTs Mode of each loop
102 (66 hex) 3 (3 hex) Get
Process
Variables
array
1
of INTs
Process Variable of each
loop
103 (67 hex) 3 (3 hex) Get Heat Outputs array
1
of UINTs Heat Output of each loop
104 (68 hex) 3 (3 hex) Get Cool Outputs array
1
of UINTs Cool Output of each loop
105 (69 hex) 3 (3 hex) Get Alarm Status array
1
of UINTs Alarm status of each loop
106 (6A hex) 3 (3 hex) Get/Set Poll Out
array
1
of UINTs
+
array
1
of USINTs
Consumed Static Output
107 (6B hex) 3 (3 hex) Get Poll In
BYTE +
array
2
of INTs +
array
3
of UINTs
Produced Static Input
1 Array size is equal to the number of loops in the controller (4 elements for four loops and 8 for eight loops).
2
Array size is equal to the two times the number of loops in the controller (8 elements for four loops and 16 for eight loops).
3
Array size is equal to the three times the number of loops in the controller (12 elements for four loops and 24 for eight loops).
Poll Connection
The poll connection allows the master to write all set points and control modes in one connection. It
also allows the reading of all process variables, set points, heat and cool outputs, and alarm status
for all of the loops.
Table 3.13 lists the sizes of the polled I/O messages. Figure 3.1 to Figure 3.4 illustrate the contents
of the polled I/O messages for the four-loop and eight-loop controllers. The
Produced Static Input
message is produced by the controller as input to the DeviceNet™ bus. The Consumed Static
Output
message is consumed by the controller.
Table 3.13 – Number of Bytes
CONTROLLER
PRODUCED STATIC
INPUT
CONSUMED STATIC
OUTPUT
Four-loop 41 12
Eight-loop 81 24