Omron CJ Series Operation Manual page 168

5 Remote I/O Communications
Registration Tables
Overview
Registration Tables are used to register Slave Units that are intended to participate at particular
node addresses (along with the models corresponding to the node addresses) to enable verifying
that they actually are participating. At the same time, they prevent unregistered Slave Units and
Slave Units of the wrong models or with the wrong node addresses from participating in the net-
work.
Registration Table
Example
Node
00
01
02
Master Unit
The Registration Table is enabled only in Registration Table Enable Mode (i.e., when SW4 (REGS)
is set to ON on the Master Unit when the power supply is turned ON and the Registration Table data
is normal). It can be used with any communications mode number.
If verification shows that the network Slave Units do not agree with the table, *_RegTblErr (Registra-
tion Table Verification Error Flag) in *_UnitSta (Status) will change to TRUE. However, remote I/O
communications will still start if the Registered Slave Unit Participation Standby Mode is disabled. If
the Registered Slave Unit Participation Standby Mode is enabled, remote I/O communications will
not start.
Operation
The operation for each case is as follows:
• If all registered Slave Units are participating within the Registered Slave Unit Participation Moni-
toring Time after the power supply is turned ON or after *_IOCycleStartCmd (Remote I/O Commu-
nications Start Switch) changes to TRUE in the I/O Communications Manual Startup Mode,
*_SlavAllCnctSta (All Registered Slave Units Participating Flag) in *_UnitSta (Status) will change
to TRUE. (The default monitoring time is 10 s for any baud rate other than 93.75 kbps, and 30 s for
93.75 kbps.
• If no unregistered Slave Units are participating, *_RegTblErr (Registration Table Verification
Error Flag) will change to FALSE.
• If an unregistered Slave Unit is participating, a Verification Error (Unregistered Slave Partici-
pating) will occur and *_RegTblErr (Registration Table Verification Error Flag) will change to
TRUE. At the same time, the NS indicator on the front of the Master Unit will flash red and the
seven-segment display will show d6.
• If all registered Slave Units are not participating within the Registered Slave Unit Participation
Monitoring Time after the power supply is turned ON or after *_IOCycleStartCmd (Remote I/O
Communications Start Switch) changes to TRUE in the I/O Communications Manual Startup
Mode, a Verification Error (Slave Missing) will occur and *_RegTblErr (Registration Table Ver-
ification Error Flag) will change to TRUE. (The default monitoring time is 10 s for any baud
5-16
Model
CRT1-ID16
CRT1-ID16-1
CRT1-OD16
CompoNet Network
Slave Unit Slave Unit
Input Slave
Input Slave
Node 00
Node 01
CRT1-ID16
CRT1-ID16-1
*1
)
CJ-series CompoNet Master Unit Operation Manual for NJ-series CPU Unit (Cat. No. W493)
Does not agree. (Model is wrong.)
Verification
Because it does not
agree, this Slave Unit
cannot participate.
Slave Unit
Output Slave
Node 02
CRT1-OD16-1