Specifications

RN: 5-56
RS3: Software Release Notes for P1 R4.2
Changes to RS3 Manuals
IO-9: Section 3 (Configuring a PLC)
Description: Add the following paragraph under this topic (page 9-3-1).
PLC Block Applications
In addition, you can configure scaling on a PLCB on the four PLCBs that
allow scaling. The four PLCBs that allow scaling are S INT Scale, U INT
Scale, BCD3 Scale, and BCD4 Scale. You can also configure alarms
based on individual coil values in a Flags data type.
Description: A note was added after the fourth bullet and the more
information was added to the end of the section under this topic (page
9-3-11).
Configuring an I/O Block to Read a PLC Register Address
NOTE: T he “Write” field appears just below the “Source Addr”
field after a source address has been entered.
Figure 9.3.3A is an example of a controlled PLC flag read. The 16 PLC
coils starting at address 1 will be read from the PLC during controller
scans when the =1G--01/A register is at 100% of scale. The 16 PLC
coils starting at address 1 will not be read from the PLC when
=1G--01/A register is at 0% of scale. This allows the controller
configuration to control when this PLC register is read. The =1G--01/A
register needs to have a value of 100% of scale for a minimum of two
seconds for the controller to read the value from the PLC.
I/O BLOCK CONFIGURATION 06-Aug-98 09:40:30
Address =1G001 Device Type PLCB
Block Tag ⇒ Block Type ⇒PLCB Mode → AUTO
Auto Lock ⇒no
Source ⇒PLCMux/A
Addr =1G-01/A Data Type ⇒Flags PLC write Mask ⇒FFFFx
Value From Source 0000x Sample Time ⇒1 S Value to PLC 0000x
Write ⇒no Sim
Tag⇒ Port⇒ A PLC number ⇒1
Addr
Value From PLC 0.
ponmlkjihgfedcba 0000x Read →filter PLC Word Address ⇒1
a: e: i: m:
b: f: j: n:
c: g: k: o:
d: h: l: p:
Hardware Alarm Code 0 Plant Unit ⇒0 Alarm Priority ⇒0
Figure 9.3.3A. Controlled PLC Flag Read