Mitsubishi A Series PLC Protocol
See also: Help for Serial Protocols
Overview
The Mitsubishi A serial downloadable protocol is for communication between the Mitsubishi A inverters and an OCS. This is a Master/Slave protocol.
Cscape Configuration
To configure OCS for the Mitsubishi protocol, select the Protocol Configuration from the Program menu in CSCAPE software. Select the appropriate protocol type on the desired port. To make sure that the Software is able to configure the equipment for the correct protocol, ensure MitsiA.dll file is in the Protocols directory of the current working/open Cscape.
Serial Port Configuration
The default link settings for the terminal are : 9600 baud, No parity, 8 data bits, 1 stop bit, RS232 communication and No handshaking.
Selecting Device Register
The packet format changes based on Device Type selected.
Address Mapping for OCS and Supported Functions
MitsiA.dll (Version 1.00 and Later) supports the following addressing modes:
Enter the desired parameter address in the Device Register field or click " > " button to view the parameter range details.
Mitsubishi A Series Drive Parameters
Parameter Type |
Parameter Range |
Format |
DATA REGISTER (D) |
0-6143 |
DECIMAL |
SPECIAL DATA REGISTER (D) |
9000-9255 |
DECIMAL |
LINK REGISTER (W) |
0-0FFF |
HEXADECIMAL |
FILE REGISTER (R) |
0-8191 |
DECIMAL |
TIMER PRESENT VALUE (TN) |
0-2047 |
DECIMAL |
COUNTER PRESENT VALUE (CN) |
0-1023 |
DECIMAL |
INPUT REGISTER (X) |
0-07FF |
HEXADECIMAL |
OUTPUT REGISTER (Y) |
0-07FF |
HEXADECIMAL |
INTERNAL RELAY (M) |
0-8191 |
DECIMAL |
SPECIAL RELAY (M) |
9000-9255 |
DECIMAL |
LATCH RELAY (L) |
0-8191 |
DECIMAL |
STEP RELAY (S) |
0-8191 |
DECIMAL |
LINK RELAY (B) |
0-0FFF |
HEXADECIMAL |
ANNUNCIATOR (F) |
0-2047 |
DECIMAL |
TIMER CONTACTS (TS) |
0-2047 |
DECIMAL |
COUNTER CONTACTS (CS) |
0-1023 |
DECIMAL |
TIMER COILS (TC) |
0-2047 |
DECIMAL |
COUNTER COILS (CC) |
0-1023 |
DECIMAL |
Network Communication Errors
In order to access the Network statistics, user must assign the “Network status register” in network configuration. The table below gives the details of statistics.
Number | Statistics | Location | Description |
---|---|---|---|
|
|
|
|
1 |
Update interval exceeded count |
%Rx |
This register explains number of times that the actual transaction scan time to complete all transactions exceeded specified update interval. Generally used as an indicator that an excessive number of triggered transfers or failed communication retries are occurring that is lengthening the expected transaction scan time.
If the Update interval is set to zero (update as fast as possible), this 32-bit register alternately specifies the actual transaction scan time in mSec resolution. |
2 |
No response count |
%R(x+2) |
This register explains number of times that a device(s) did not respond to a transaction. This includes ALL failed transaction, not just those after the retry count is exceeded. |
3 |
Corrupt Response Count |
%R(x+4) |
This register explains number of times that a device(s) returned an invalid or failed response to a transaction. This includes ALL failed.
Transaction, not just those after the retry count is exceeded. |
4 |
Valid Response Count |
%R(x+6) |
This register explains total number of valid responses. |
NOTE: %Rx: 32-bit network status register configured in Network configuration. For example: %R500(501).
Device Communication Errors
Error | Error Number | Description |
---|---|---|
INVALID_BLOCK |
-203 |
Invalid size for data type. |
NO_RESPONSE_FROM_PLC |
-204 |
Timeout while waiting for remote node response. |
INVALID_RESPONSE_FROM_PLC |
-205 |
Corrupted response from remote node. |
INVALID_INITIALISATION |
-207 |
Internal Error - Unable to open port. |
Connection Details
Illustrations below show the various end-of-cable connectors required:
25-Pin D-Type Male | 10-Pin Weidmuller
Cage Clamp |
8-Pin RJ 45 Plug | 9-Pin DB Male |
CN1 | CN1 | MJ1/MJ2 | Port 1 |
Port 1 — DB9 (Female at OCS end)
MJ1/MJ2 — RJ45 (Female at OCS end)
CN1 — 10-Pin Weidmuller Cage Clamp (Female at OCS end)
CN1 — DB25 (Female at OCS end)
NOTES:
-
Do not connect to unlisted pins.
-
Recommended Cable: Beldon 9503, twisted multipair, screened.
-
Connect the screens together at the shield / earth pin of the PLC.