Top-Down Method; Bottom-Up, Without Addressing Unit; Top-Down, With Addressing Unit - Omron CQM1-ARM21 Operation Manual

Top-down Method

5-2-2 Bottom-up, without addressing unit

1, 2, 3...

5-3 Top-down Method

5-3-1 Top-down, with addressing unit

1, 2, 3...
If no separate addressing unit is available, the CQM1-ARM21 can perform the
task of assigning addresses to blank slaves. Since all slaves are factory-set to
address 0, they need to be added and re-programmed one by one.
1. Connect the AS-Interface cable and power supply to the CQM1-ARM21.
2. Put the master in Setup Mode (MOD switch OFF, Mode bit IR m.01 ON).
3. Connect one new slave, with address 0, to the AS-Interface cable. The
master's 'slave 0' LED should flash.
4. Change the slave's address from 0 to the projected value (see 4-5-3-5,
Change_Slave_Address); the CQM1-ARM21 will automatically recognise
the slave at the new address, and the appropriate slave indicator LED
should be ON.
5. If necessary, set the slave parameters (see 4-5-3-9, Write_Parameter).
6. Repeat steps 3 - 5 for all slaves.
7. Toggle the SET switch (OFF→ON) to copy the actual configuration to the
permanent configuration (Put the SET switch back to OFF position).
8. The slave indicator LEDs of the active slaves should be ON, none should
flash, and the CERR LED should be OFF.
9. Put the CQM1-ARM21 in Protected Mode (MOD switch ON).
This is the safest way to set up the AS-Interface network. The projected slave
configuration can be defined in advance, and stored in the master unit. When
installing the system, the user can easily verify if the actual slave configuration
matches the projected configuration. If a wrong type of slave was installed, or
a slave with the wrong address, a configuration error will be indicated. If there
is no configuration error, the only possible type of error is that slaves are
mounted on the wrong position on the line.
If a separate addressing device is used to set the slave addresses off-line, no
configuration work is required in the field.
If an addressing unit is available, the whole AS-Interface slave network and
the master can be prepared separately. When the master is connected to the
network, any errors in the configuration can easily be found.
1. Apply power to the PLC and to the ASI+ and ASI- terminals. During off-
line preparation, it is possible to temporarily use a standard 24 V DC
power supply (100 mA min.) instead of an AS-Interface power supply.
The ARM21's RUN LED will flash as long as no slaves are detected.
2. Put the master in Setup Mode (MOD switch OFF, Mode bit IR m.01 ON).
3. Define each projected slave's address and type (see 4-5-3-3,
Set_Permanent_Configuration). If necessary, set each slave's parame-
ters (see 4-5-3-7, Set_Permanent_Parameter).
Section 5-3
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