Mitsubishi Electric FX5-DP-M, User Manual

Page: 144 / 176

142
APPX
Appendix 3 Buffer Memory
Slave status area (Normal communication detection)
■
Slave status area (Normal communication detection) (Un\G23040 to Un\G23043)
This area stores the communication status of DP-Slaves.
Turning off 'Data exchange start request signal' (Un\G2.b0) causes all the information in 'Slave status area (Normal
communication detection)' (Un\G23040 to Un\G23043) to be cleared.
• 0: A data exchange error has occurred or no data have been exchanged (including reserved stations, temporarily reserved
stations, and not-configured stations)
• 1: Data are being exchanged
The values in the table indicate which number of DP-Slave each bit represents.
Turning on 'Data exchange start request signal' (Un\G2.b0) updates information in 'Slave status area (Normal communication
detection)' (Un\G23040 to Un\G23043) and turns on bits for the DP-Slaves that are exchanging data.
Occurrence of data exchange error at a DP-Slave turns off the relevant bit, which is turned on again after the recovery.
Bits in Slave status area are assigned in the order of parameters configured with PROFIBUS Configuration
Tool (order of FDL address).
Modifying the parameters with PROFIBUS Configuration Tool (adding or deleting a DP-Slave) causes the
buffer memory areas to be reassigned. Review the program after modifying the parameters.
Address b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Un\G23040 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Un\G23041 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
Un\G23042 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
Un\G23043 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
 A data exchange error occurs
 The data exchange error is recovered
OFF
0H 0H 1H
OFF
ON
'Data exchange start request signal'
(Un\G2.b0)
'Slave status area (normal data exchange
detection)' (Un\G23040 to Un\G23043)
OFF
0H 0H 0H
 
1H 1H
OFF
ON
'Data exchange start request signal'
(Un\G2.b0)
'Slave status area (normal data exchange
detection)' (Un\G23040 to Un\G23043)