CV500BSC51 Omron, CV500BSC51 Datasheet - Page 57

• Manufacturer Part Number: CV500BSC51
• Description: Programmable Logic Controller
• Manufacturer: Omron

Specifications of CV500BSC51

• Peak Reflow Compatible (260 C): No
• Leaded Process Compatible: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Slave Mode Functions
5-2-3
5-2-4
40
Sending SRQ Messages in Slave Mode (Interrupt Request)
Executing Enhanced BASIC Commands
Note
Note When serial polling is performed because an SRQ message has been sent to
When the GP-IB Interface Unit is operating in Slave mode, it can send an
SRQ message to the system Controller. To send an SRQ message, turn ON
(OFF
the GP-IB bus, the status byte (bits 08 to 15 of n) will be sent to the GP-IB
bus. If the GP-IB Interface Unit is polled and did not send the SRQ message,
the status byte will be output with the 7
Enhanced BASIC commands are special commands supported by the GP-IB
Interface Unit. When the enhanced BASIC commands are being used, enable
the enhanced BASIC commands function in the allocated DM area words by
setting the corresponding byte (bits 08 to 15 of m+1) to 01 Hex.
1. When the Unit receives data from the GP-IB bus, it determines whether or
2. Enhanced BASIC commands are not treated as reception data, so the
SRQ Request Bit
(BIt 14 of n)
SRQ Received Flag
(BIt 12 of n+7)
(SRQ signal)
CPU Unit
not the data is an enhanced BASIC command. A command error will occur
if the enhanced basic commands function is enabled in the allocated DM
area words but the data that was received is not an enhanced BASIC com-
mand.
commands are not stored in the buffer and not included in the “number of
bytes of reception data.”
ON) the SRQ Request Bit (bit 14 of n).
1. Turn ON the SRQ
4. When the status
Request Bit.
byte is read, the
SRQ Received
Flag is turned
OFF.
Turned ON by
ladder program.
Turned ON
by Unit.
Serial polling
GP-IB
Interface Unit
Slave mode
Buffer
memory
n = CIO 2000 + (10
th
(bit 14 of n) set to 0.
Status sent
2. The SRQ signal
3. The Controller
Turned OFF
by Unit.
is output to the
GP-IB bus.
performs serial
polling and
reads the status
byte.
Turned OFF by
ladder program.
unit number)
Controller
When the flag goes
from ON to OFF, it
indicates that the
serial polling status
has been sent.
GP-IB
Device
Section 5-2