Watlow Series PD - Manual (Page 156)

- Name
This field, when entered will automatically be added as a controller tag and will be
used in the program when referencing PD inputs or outputs.
- Description
No entry required
- Comm Format
As can be seen in the Static and Dynamic assemblies below, the PD data formats
are dependent on the tag name being written to or read from. See data types below.
- IP Address
Enter here, the previously acquired PD IP address.
-
Assembly Instance
- Input, PD to ControlLogix
This field will identify either the Static 0x64 (100 decimal) or Dynamic 0x65 (101
decimal) input assembly Target to Originator (T
Æ O)
- Output, ControlLogix to PD
This field will identify either the Static 0x70 (112 decimal) or Dynamic 0x71 (113
decimal) output assembly Originator to Target (O
Æ T)
- Configuration
The PD does not use the configuration instance 0x80 (128 decimal) however it still
needs to be entered here.
- Assembly Size
The assembly size is dependent upon 2 factors:
1. Comm Format, i.e., DINT or INT
2. Size will vary depending on whether or not the Static or Dynamic Assembly is in
use.
- Static O
Æ T max size = 10 words, Dynamic O Æ T max size = 30 words
- Static T Æ O max size = 22 words, Dynamic T Æ O max size = 42 words
The size for the configuration instance although not used, will always be stated as 0.
- Data Types
As can be seen in the chart below, the data types used within the PD vary. Because
there is no status returned from the PD in either the static or dynamic assembly it is
suggested that the Comm Format be configured for DINT or INT.
BOOL = Boolean
SINT = 8-bit signed integer
INT = 16-bit signed integer
DINT = 32-bit signed integer
USINT = 8-bit unsigned integer
UINT = 16-bit unsigned integer
UDINT = 32-bit unsigned integer
WORD = 16-bit, bit string
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