Siemens SINUMERIK 840C Installation Instructions Manual page 1131

12 Functional Descriptions
12.35 Uninterruptible power supply (UPS) (as from SW 6.3) (Express shutdown)
Example "Express shutdown"
Notes
1. A detailed description of the I codes as well as the FX73/74 is contained in the Win-OEM
document.
Only the I code 042F (Express shutdown) is currently implemented for the FlexOS control.
The use of the FX73 and FX74 is limited to this one function.
2. Acknowledgement bytes (3x FY)
The error numbers are contained in the Win-OEM document (FX73/74).
The following setting up applies:
1st byte Error bit
If the bit is "0", then the other two bytes are valid.
To start with, evaluation of this bit (Error Yes/No) in the user program
will suffice.
2nd byte Coupling error (while accessing the mailbox)
3rd byte User error (incorrect parameterization, incorrect user data, etc.)
3. Express shutdown
Described in the Win-OEM documentation.
Take note of the fact that (contrary to the description) the low and the high byte are to be
swapped on the I code and the control flag!
4. OEM information bit (FX74 OEM-EMPF)
The PLC MD 137 is monitored for a valid input only by the system (<25 / >254).
Permitted are according to the Win-OEM documentation (FX74) FW 25 ... 198.
If another FW is entered (e.g. 220) there will be no error message.
"Express shutdown" is implemented, the I code, however, will not be acknowledged!
Structure of the user data blocks for the OEM-SEND (FX73)
DW x Length of package
(ideally reserve with 10 i.e. length: 10 DW).
The FX does no explicitly check the package length. A value of > 1 and < 30
must be entered.
DW x+1 Task sender
"0201H" - PLC
DW x+2 Task receiver
"0319" - mailbox MMC
DW x+3 Task data structure
always enter "1"
DW x+4 Task number
"5F02H"
DW x+5 I code
"2F04H" (express shutdown)
DW x+6 Control flag
"0090H"
12–356
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© Siemens AG 1992 All Rights Reserved
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6FC5197- AA50
SINUMERIK 840C (IA)