80
83-530-000 Rev J
8.9.3. Read Power-On Time
This query allows you to read how many minutes the power supply has been running
since it was built. The accuracy, in minutes, is not guaranteed for time critical
applications.
Query Format:
Send two bytes of unreadable characters. First:
Byte 1 = 1010 0110 = A6 hex
Byte 2 = 000x xxxx (where xxxxx is the address of the supply in binary)
Query Response:
The power supply returns 12 characters:
First is the minutes as a 32 Bit integer as 8 ASCII Hex bytes
Then four printable characters:
Dollar sign “$”
Checksum (two ASCII hex characters) = “30” or “31”
Carriage-return terminator
8.9.4. Service Request Messages
A Genesys power supply can automatically send messages over the RS-232/485 lines
when there is a change in operating mode or if a fault occurs. These messages are called
Service Requests or SRQs. They are setup with the RS-232/485 status registers (see
Section 8.11 and 8.12).
Since the SRQ messages may be sent from any supply at any time, there is a chance
they can collide with other messages from other supplies. Your controller software has to
be developed enough to read messages that may come at any time, and to recover if
messages are corrupted by collisions.
If you need Service Request messaging, please contact TDK-Lambda for assistance. We
can provide several special communication commands and settings that will help with
this.
8.10. Status and Error Commands
The following commands operate on the power supply status and error registers. They are
used to read operating conditions and fault conditions, they can be set to latch changes in
these conditions, and masks can be set up to send service requests messages if the
conditions change.
Refer to Section 8.11 and Figure 8-7 for more instructions on using these register
commands.
Table 8-9
# Command Description
2 FLT? Reads Fault Conditional Register. Returns 2-digit hex.
3 FENA Set Fault Enable Register using 2-digit hex.
4 FENA? Reads Fault Enable Register. Returns 2-digit hex.
5 FEVE? Reads Fault Event Register. Returns 2-digit hex. Clears bits of Fault Event
6 STAT? Reads Status Conditional Register. Returns 2-digit hex.
7 SENA Sets Status Enable Register using 2-digit hex.
8 SENA? Reads Status Enable Register. Returns 2-digit hex.
9 SEVE? Reads Status Event register. Returns 2-digit hex. Clears bits of Status Event
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