Siemens SINUMERIK 840D sl Commissioning Manual page 410

Commissioning HMI Advanced (IM4)
2 Setting Functions and Parameters
Acknowledgment byte from
Table 2-4 DB19.DBB26 (HMI
Bit 7
Selection
Job processing
A PLC job is processed according to the following scheme:
1. The PLC may only initiate a job in the job byte if the acknowledgment byte is 0.
2. The HMI mirrors the job (excluding the parameter set) in the acknowledgment
byte (signaling to the PLC that its job is being processed). The PLC receives a
"job active" signal for an unfinished job.
3. Once the operation is finished (OK or Error), the PLC must respond again and
delete the job byte.
4. In response, the HMI sets the acknowledgment byte to 0.
This scheme ensures sequential processing of jobs.
User control file
The names of the job lists to be executed are stored in control file
PLC_IN_OUT_xxx.TEA in the display machine data directory (/BD.DIR) on the
HMI, where "xxx" represents a number between 001 and 127. The file contains a
maximum of 127 references to job lists.
The user must create this file.
The PLC sets an index (1-127) via DB19.DBB16, which determines the control file
in which the job list names are stored.
Example: User control file PLC_IN_OUT_003.TEA
N1
N2
N3
N4
The line numbers (N..) can be omitted.
The file can be edited.
Example: Loading a job list
Requirement:
• Existing file PLC_IN_OUT_003.TEA
• Acknowledgment byte
• Define PLC index for the control file
• Define PLC line offset 2
• PLC job:
• HMI signals to the PLC: Job list is loaded (DB19.DBB26,6=1)
IM4/2-16
SINUMERIK 840D sl/840D/840Di/810D Installation and Start-Up HMI (IAM) - 08/2005 Edition
for the current data transfer status:
HMI
PLC)
Bit 6 Bit 5 Bit 4
Load Unload
/WKS.DIR/OTTO.WPD/OTTO.JOB
/WKS.DIR/WELLE.WPD/KANAL1.JOB
...
...
N1 job list A
N2 job list B
N3 job list C
DB19.DBB26
Load
Job list B is loaded
Bit 3 Bit 2
Active Error
is 0.
(DB 19, DBB16 = 131)
(DB 19, DBB17 = 2)
(DB 19, DBB13,6=1)
© Siemens AG, 2005. All rights reserved
08/2005
Bit 1 Bit 0
OK res. PLC