Specifications

RN: 5-61
RS3: Software Release Notes for P1 R4.2
Changes to RS3 Manuals
NOTE: M ake sure to verify the scaling of the values in the PLC
registers, and match them to your scaling in the PLCB. Otherwise,
erroneous values will result.
I/O BLOCK CONFIGURATION 4-Aug-98 10:57:34
Address =2B008 Device Type PLCB
Block Tag ⇒ Block Type ⇒PLCB Mode ⇒AUTO
Auto Lock ⇒No
Source ⇒DMC-6
Addr =2B- 010 Data Type ⇒ S Int Scale
Value From Source 0200x Sample Time ⇒1S
Write ⇒filter Sim
Block Out .00 Tag ⇒ Port⇒ A PLC Number ⇒7
Addr
Value From PLC .0
0000x Read ⇒filter PLC Word Address ⇒1000
PLC Zero ⇒00000 Eng Zero ⇒.00 Eng Units ⇒
PLC Max ⇒32767 Eng Max ⇒100.00 Descriptor ⇒adescriptor
Alarm Crit Hi ⇒None Alarm Adv Hi ⇒None
Al DdBand ⇒1.00
Alarm Crit Lo ⇒None Alarm Adv Lo ⇒None
Hardware Alarm Code 0 Plant Unit ⇒0 Alarm Priority ⇒0
Figure 9.3.x PLCB I/O Block Configuration Screen
Limits on the entries to the PLC Zero and PLC Max fields depend on the
data types (see Table 9.3.9A).
Table 9.3.9A PLC Zero and PLC Max Entry Limits
Data Types
BCD3 Scale BCD4 Scale S int Scale U int Scale
Range for PLC
Zero and PLC
Max
0to999 0 to 9999
--32768 to
32767
0 to 65535
Types of PLC Scaling
The incoming value from the PLC must be scaled in the PLC Zero and
PLC Max fields. The number to enter depends on what is being
measured and the r esolution of the A/D converter in the PLC that
provides the number. This scaling converts the incoming PLC reading to
an internal 0 or 1 similar to what is used with 4--20 mA transmitters. For
such transmitters, scaling is unnecessary since it is known that 4 m A
represents the minimum and 20 mA represents the maximum value.
The default values for PLC Zero and PLC M ax are 0 and 1 respectively.