Buffer Memory Details; Module Status Area; Network Connection Status Area - Mitsubishi Electric Melsec Q Series User Manual

3
SPECIFICATIONS

3.6 Buffer Memory Details

This section explains the buffer memory details.

3.6.1 Module status area

The ON/OFF status of the MES interface module LED, setting status of the intelligent
function module switches, and battery status are stored.
Refer to the following for details.
• Section 4.3 Parts Names
• Section 4.5 Intelligent Function Module Switch Settings

3.6.2 Network connection status area

The status of network connection to which the MES interface module is currently
connected is stored.
(1) Storage example of IP address (Buffer memory address: 55 to 56)
For 192. 168. 3. 3, each octet (192 (first octet). 168 (second octet). 3 (third octet). 3
(fourth octet)) is stored as follows:
(2) Storage example of Subnet mask (Buffer memory address: 57 to 58)
For 255. 255. 255. 0, each octet (255 (first octet). 255 (second octet). 255 (third octet).
0 (fourth octet)) is stored as follows:
(1) The values stored in buffer memory are cleared when the programmable
controller is powered ON from OFF, or the programmable controller CPU is
reset.
(2) When a value of 65536 or more is stored in the area composed of one word, a
count is stopped at FFFFh (65535).
(3) If a value of more than two words is stored in the area composed of two
words, a count is stopped at FFFFFFFFh (4294967295).
b15
Buffer memory address: 55
56
b15
Buffer memory address: 57
58
to b8 b7
03 (3)
H
Third octet value Fourth octet value
C0 (192) A8
H
First octet value Second octet value
to b8 b7
FF (255)
H
Third octet value Fourth octet value
FF (255) FF
H
First octet value Second octet value
3.6 Buffer Memory Details
3.6.1 Module status area
to b0
03 (3)
H
(168)
H
to b0
00 (0)
H
(255)
H
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