Pro-face GP77R Series Connection Manual page 8

HIDIC H Series Ethernet Protocol Limitations
When conecting your GP/GLC unit using the HIDIC H Ethernet Protocol to an
HIDIC H Series unit or a Web Controller, the following limitations apply.
Device Address and Node Number Limitations
When a device address's size is larger than 1024 (1K) or a different Node Number
set, the number of available device addresses will vary. The GP uses internal records
that are used to set the device addresses. These records are limited to 64. For
example, when the WR0 device address is set, a single record is used in the GP.
For detailed examples, refer to the following chart.
Ex1.) Number of records used when designating tag setting numbers.
Ex2.) When setting tags from WR0000 to WR4000 in Word Internal Output, since
GP-PRO/PBIII for Windows Device/PLC Connection Manual
Setting Node Device
No. Number Address
1 1 WR0
2 1 WR1024
3 2 WR0
4 2 WR1024
5 1 WM0
6 1 WM1024
7 1 WR2048
8 2 WR2048
9 3 WR2048
10 3 WR2049
When the total number of Node Number and Device Addresses exceeds
1024, GP internal records are used. However, if the Node Number and
Device Address are the same type, no record will be used, even if the device
types are different.
one record is used for every 1024 addresses, a total of 16 records will be
used.
16384(0x4000)/1024=16
Therefore, when setting the same number of tags for each node, settings for a
total of four nodes can be set.
64/16=4
When the number of records is over 65, the following error message will
appear on GP-PRO/PBIII for Windows.
"Address entry limit reached. No more can be entered."
Hitachi Industrial Equipment System - Ethernet
Remaining
Number of
records in GP-
PRO/PBIII
63 Uses one record
62 Uses one record
61 Uses one record
60 Uses one record
Since the Node Number and address
60 range already exist as setting No.1, no
records will be used.
Since the Node Number and address
60 range already exist as setting No.2, no
records will be used.
59 Uses one record
58 Uses one record
57 Uses one record
Since the Node Number and address
57 range already exist as setting No.9, no
records will be used.
Note
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