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83503001 Rev G
7.9.4. 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 7.10 and 7.11).
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.
7.10.
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 the next section for more instructions.
#
Command
Description
1
FLT?
Reads Fault Conditional Register. Returns 2-digit hex.
2
FENA
Set Fault Enable Register using 2-digit hex.
3
FENA?
Reads Fault Enable Register. Returns 2-digit hex.
4
FEVE?
Reads Fault Event Register. Returns 2-digit hex.
Clears bits of Fault Event Register.
5
STAT?
Reads Status Conditional Register. Returns 2-digit hex.
6
SENA
Sets Status Enable Register using 2-digit hex.
7
SENA?
Reads Status Enable Register. Returns 2-digit hex.
8
SEVE?
Reads Status Event register. Returns 2-digit hex.
Clears bits of Status Event register.
