46
Note:
Extended address mode
When more than one unit is connected to
multiple PLCs of the same kind. (Available for
some RS485 models listed with the 485 2W
suffix.
The addressing method is as follows:
Device type, followed by the PLC ID number, a
'#', then the word or bit number.
As shown in diagram: PLC 3, 0x, bit 27 is used
for Device.
Example: Modbus RTU (485 2W)
Device type
Address
Description
0x:
1#06
PLC 1, Data Bit 00006
4x:
2#45
PLC 2, Holding Register 40045
3x:
12#54
PLC 12, Input Register 30054
Note:
PLC ID number range is limited to: 0~255.
Note
: HMI Internal registers and bits. (Reference the
System Bit and Register
section.)
•
LB
(Local Bit) and
LW
(Local Word) are the designations for internal bits and words of the MMI. The range for
general use is 0 to 8999. Bits and words from 9000 to 9999 are reserved for system use.
•
RB
bits and
RW
words are internal retentive memory options.
RBI
and
RWI
are the indexes to retentive memory
locations.
•
Ms_RB, Ms_RW, Ms_LW and Ms_LB
are bits and words located in the Master HMI when Master/Slave link ups
are used.
Using a Tag to enter a Read or Write Device
Check the Tag box to select a Tag for the Device
Type and Address. Select the Tag that corresponds to the
control bit or word for the Part.
Note:
Tags must be predefined before use. The Tag
database is located in the
Library|Tag…
menu. See the
section on Tags for more details.
Retrieving Data from the Auxiliary Port
Check the Aux. box to direct the source of the
Read/Write address to the Auxiliary Port.
Note:
Be sure the Auxiliary Port is set in the System
Parameters. If no device is present on the Auxiliary port,
an error will be returned.
Summary of Contents for MMI-1500
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