Omron NS -, Руководство по программированию

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Section 1 Overview 1-3 Communicating with the Host
1-22
NS Series Programming Manual
1-3-5 Host Link
The Host Link method uses a 1:1 connection between the host and a PT to read and display word and
bit data from the host. Many PLC models can be connected using Host Link.
The following PLCs can be connected to NS-series PTs using Host Link. The PLCs are connected via
their built-in serial port or a Host Link Unit supported by the PLC.
C Series
C200HS, C200HX/HG/HE(-Z), CQM1, CQM1H, CPM2A/CPM2C, CPM1/CPM1A, C500, C1000H, and
C2000H
CV Series
CV500, CV1000, CV2000, and CVM1
CS/CJ Series
CS1G/CS1H, CS1G-H/CS1H-H, CJ1G, CJ1G-H/CJ1H-H, CJ1M, CP1H, CP1L, and CJ2H
Refer to Host Connection Manual: Host Link for details on Host Link communications settings.
1-3-6 EtherNet/IP
EtherNet/IP is an industrial multivendor network protocol that uses Ethernet. The specification is an
open standard managed by the ODVA (Open DeviceNet Vendors Association) as is DeviceNet, and it is
used for a variety of industrial devices. With NS-series PTs, communications can be performed with
CS/CJ-series EtherNet/IP Units and CJ2H-CPU
@@ -EIP Units with a built-in EtherNet/IP port.
Also, tag message communications can be used if a CJ2H-CPU @@ -EIP is connected. The
CJ2H-CPU
@@
-EIP has a tag name server in the CPU Unit. If a table of tag names and addresses is
saved in advance in the CPU Unit, access can be made from the NS-series PT by using only a tag.
1-3-7 PT Memory
PT memory is made up of internal memory and system memory.
Internal Memory
The internal memory in the PT can be read and written by the user. Internal memory can be allocated
as required for settings, such as the addresses for functional objects.
The internal memory is divided into four sections.
Memory Contents
$B Bit Memory
Bit memory is used for I/O flags and signal information.
Up to 32 Kbits (32,768 bits).
$W Word Memory
Word memory is used to store numeral and character string data.
Each word contains 16 bits, but consecutive words can be used as required for
character strings and 32-bit data.
Up to 32 Kwords (32,768 words).
$HB Internal Holding Bit Memory
Internal Holding Bit Memory is used for I/O flags and signal information.
Up to 8 Kbits (8,192 bits) can be used. Values are held even when the power supply
to the PT is turned OFF.
$HW Internal Holding Word Memory
Internal Holding Word Memory is used to store numeral and character string data.
Each word contains 16 bits, and consecutive words can be used as required for
character strings and 32-bit data.
Up to 8 words (8,192 words) can be used. Values are held even when the power
supply to the PT is turned OFF.