Rockwell Automation 1336T PLC Comm. Adapter, Series B, FRN 2.xx-3.xx - Manual (Page 70)

4–4
Publication 1336 FORCE–5.13 –– September, 1998
Command: Description:
PLC TYPED READ
(N30:0–493)
This request translates into a read parameter full
message in the 1336 FORCE. Each parameter
specified results in 20 words of data (actual value,
minimum value, maximum value, descriptor, and
parameter text). You can read a maximum of 50
parameters with this service if your PLC uses a file
size of 1000 words. If your PLC uses a different file
size, this service may take a different number of
parameters.
PLC 5 TYPED READ
(N40:0–63)
This message emulates the RIO block transfer
functions available on the PLC Communications
Adapter Board with the exception of the multiple
parameter read. Refer to the message structure
section in Chapter 7, Block Transfer Services, for
details on the available messages and their use.
PLC 5 TYPED WRITE
(N40:0–63)
This message emulates the RIO block transfer
functions available on the PLC Communications
Adapter Board. Refer to the message structure
section in Chapter 7, Block Transfer Services, for
details on the available messages and their use.
PLC 5 TYPED READ
(N70:0–499) for Trend 1
(N71:0–499) for Trend 2
(N72:0–499) for Trend 3
(N73:0–499) for Trend 4
This message reads the trend sampled data, which is
the data retained when a trigger condition occurs. A
file of 70 corresponds to trend 1, 71 to trend 2, 72 to
trend 3, and 73 to trend 4.
The remainder of this chapter shows three rungs from a sample
program for a PLC 5/15.