Omron CJ1W-PRT21 Operation Manual page 89

Precautions for Correct Use Precautions for Correct Use
The contents will only change
• When the unit has accepted a Set_Prm and a Chk_Cfg telegram from a master.
• When the slave exits 'data_exchange' state (resets all data to FALSE, except Master address
= 255).
The user should make sure not to overwrite this information by the CPU program.
DM indication is not synchronised with the CPU refresh cycle, this information is intended for
debugging purposes.
3-7-1 Slave Parameter Data (*_SlvParamSta)
The CJ1W-PRT21 unit indicates slave parameter data information in the first two words of the allocated
Dm and Dm+1 area (*_SlvParamSta) allocated via the Machine No. setting.
15 14 13 12 11 10
*_SlvParamSta
Name of Device Variable for CJ-
series Unit
*_SlvMstrAdr
*_SlvGrp1
*_SlvGrp2
*_SlvGrp3
*_SlvGrp4
*_SlvGrp5
*_SlvGrp6
*_SlvGrp7
*_SlvGrp8
CJ-series PROFIBUS Slave Unit Operation Manual for NJ-series CPU Unit (W510)
3 Data Exchange with the CPU Unit
9 8 7 6 5 4 3 2
Type R/W Description
USINT R Master
Address
BOOL R Slave assigned
to Group 1
BOOL R Slave assigned
to Group 2
BOOL R Slave assigned
to Group 3
BOOL R Slave assigned
to Group 4
BOOL R Slave assigned
to Group 5
BOOL R Slave assigned
to Group 6
BOOL R Slave assigned
to Group 7
BOOL R Slave assigned
to Group 8
1 0
*(Group assignment)
Function
Low byte: Integer value (00 to 125) indicating
the node address of the PROFIBUS-DP Master
from which the Unit has received and accepted
the Chk_Cfg and Set_Prm telegrams. 255 indi-
cates that the slave has not been configured by
a master.
Indicates to which groups (numbered 1-8) the
slave has been assigned by the PROFIBUS-DP
master / configurator. When receiving a global
control command, the slave will decide if the
command is intended for a group of slaves to
which it has been assigned.
The value is provided by the PROFIBUS mas-
ter's Set_Prm telegram, and indicated in D m
after both the Set_Prm and Chk_Cfg telegrams
have been accepted.
3
*_SlvMstrAdr
*_SlvGrp1
*_SlvGrp2
*_SlvGrp3
*_SlvGrp4
*_SlvGrp5
*_SlvGrp6
*_SlvGrp7
*_SlvGrp8
3-21