Link Special Relays And Registers (Sb/Sw); Link Special Relays (Sb) - Mitsubishi Electric MELSEC QS Series User Manual

8
PROGRAMMING SPECIFICATIONS

8.3 Link Special Relays and Registers (SB/SW)

The data link status can be checked with bit data (link special relays: SB) and word data
(link special registers: SW).
The SB and SW represent the information in the buffer memory of the safety master
module, which are read into the devices specified with automatic refresh parameters for
use. The applicability of them may vary depending on the safety CPU operation mode.
Example) When SB0200 and SW0200 are specified for SB and SW

8.3.1 Link special relays (SB)

Relays SB0000 to SB001F turn ON/OFF by a sequence program or the device test
function of GX Developer, and SB0020 to SB01FF turn ON/OFF automatically.
The values in parentheses in the number column indicate the buffer memory addresses.
Example) When the buffer memory address is 5E0H and the bit number is 8
For the correspondence with the buffer memory, see Section 8.2.2 (5).
Number Name
SB0008
Line test request
(5E0 ,b8)
H
SB0020
Module status
(5E2 ,b0)
H
* 1 Safety remote net (Ver. 1 mode)
* 2 Off line, Hardware test or Line test.
8
- 17 8.3 Link Special Relays and Registers (SB/SW)
8.3.1 Link special relays (SB)
respectively, refresh is performed as follows:
SB0000 to SB01FF
SW0000 to SW01FF
Link special relays (SB)
Link special registers (SW): Buffer memory addresses600
IMPORTANT
(1) SB and SW of the safety master module are not safety information. They
cannot be used in programs created to control safety equipment.
(2) Although SB and SW are stored in the buffer memory, they cannot be read or
written directly. To read or write them, make the auto refresh setting.
(3) Do not write data to any SB/SW that is not specified in this section. Doing so
may cause failure in data link.
5E0 , b8
H
Table8.5 Link Special Relay List (1/3)
Executes line tests for the stations specified by SW0008.
When executing a line test from GX Developer, do not
write this by sequence programs or in a device test.
OFF : Not requested
ON : Requested
Indicates the module access (module operation) status.
Since this is information updated by the system, do no
write this by sequence programs or in a device test.
OFF : Normal (Module operating normally)
ON : Error (Module error has occurred)
SB0200 to SB03FF
SW0200 to SW03FF
: Buffer memory addresses 5E0
Description
to 5FF
H H
to 7FF
H H
Availability
( :Available, :Not available)
1
Online*
SAFETY TEST Offline*
MODE MODE
2