Specifications

CHAPTER 4
OPERATION
4-17
DT-203X, DT-105X and DT-110X display series
4.4.3. Omron protocol.
Omron protocol supports two kinds of messages. Messages with and without
variables.With this protocol the display may control as many as 6 messages without variables
and 4 messages with variables together. All messages are shown sequentially.
To know what message should be shown, the display reads a table of 18 DM’s from the
PLC memory. The first DM number must be configured into the DM parameter. This
parameter is specific for this protocol.
The OMRON Hostlink protocol does not work with RS-485, but with RS-422.
The next table shows the meaning of each DM
DM Number
DM n
Number of Message without variables 1
DM n+1
Number of Message without variables 2
DM n+2
Number of Message without variables 3
DM n+3
Number of Message without variables 4
DM n+4
Number of Message without variables 5
DM n+5
Number of Message without variables 6
DM n+6
Number of Message with variables 1
DM n+7
Number of Message with variables 2
DM n+8
Number of Message with variables 3
DM n+9
Number of Message with variables 4
DM n+10
Number of DM where variable 1 is located
DM n+11
Total number of DM's of variable 1
DM n+12
Number of DM where variable 2 is located
DM n+13
Total number of DM's of variable 2
DM n+14
Number of DM where variable 3 is located
DM n+15
Total number of DM's of variable 3
DM n+16
Number of DM where variable 4 is located
DM n+17
Total number of DM's of variable 4
4.4.3.1. Set a message without variables.
When you want to set a message without variables, you should put the Message
Number into a free place on the DM table, between positions DM n and DM n+5. If more than
one message is set, the position into the table is used to control the order in which messages
will be displayed.
4.4.3.2. Reset a message without variables.
To reset messages without variables, you must set its position on the table to 0
orchange the message number for the other message number. To display the message 15, the
DM must be 15 in BCD
Examples:
DM parameter = 108
DM parameter = 2145
DM parameter = 1
DM 108
0
DN 2145
4
DM 1
2
DM 109
0
DM 2146
0
DM 2
6
DM110
15
DM 2147
0
DM 3
0
DM 111
0
DM 2148
156
DM 4
0
DM 112
0
DM 2149
0
DM 5
0
DM 113
0
DM 2150
0
DM 6
24
Message 15 ON
Meesages 4 and 156 ON
Messages 2, 6 and 24 ON