Omron SYSMAC CV Series - Network Instructions; Disable Access: Iosp(187)

(187)
IOSP
0000
00
413
5-36 Network Instructions
The Network Instructions are used for communicating with or control PCs or oth-
er Units linked through the SYSMAC NET Link System or SYSMAC LINK Sys-
tem. The first two Network Instructions are used to control the access right to the
PC from both local and remote Peripheral Devices.
5-36-1 DISABLE ACCESS: IOSP(187)
(187)
IOSP
Variations
j IOSP(187)
Ladder Symbol
When the execution condition is OFF, IOSP(187) is not executed. When the ex-
ecution condition is ON, both read and write access to PC memory from all Pe-
ripheral Devices (GPC, CVSS, SSS, and Programming Console) and access
from BASIC Units, Personal Computer Units, Ethernet Units, and Temperature
Controller Data Link Units, and through SYSMAC NET Link Systems, SYSMAC
BUS/2 Systems, SYSMAC LINK Systems, Host Link Systems, etc., is disabled.
Access to memory is disabled until either END(001) or IORS(188) is executed or
PC operation is stopped.
If PC memory is being accessed when IOSP(187) is executed, access will not be
disabled until the current accessing has been completed.
IOSP(187) is designed to temporarily disable access, e.g., during read/write op-
erations. Servicing CPU Bus Units, the host link interface, and Peripheral De-
vices can also be disabled by turning ON the bits shown in the following table.
These bit can be turned ON at the beginning of the user program to more perma-
nently disable memory access than is possible with IOSP(187), which is effec-
tive only until the next IORS(188) or END(01) instruction (or until power is turned
OFF).
Bit(s) Name Function
A01500 through
A01515
CPU Service Dis-
able Bits
Turned ON to stop service to CPU Bus
Units numbered #0 through #15, respec-
tively.
A01703 Host Link Service
Disable Bit
Turned ON to stop Host Link and NT Link
System servicing.
A01704 Peripheral Service
Disable Bit
Turned ON to stop service to Peripheral
Devices.
There are no flags affected by this instruction.
Example When CIO 000000 is ON in the following example, memory access is disabled
from Peripheral Devices, through communications systems, and from other
specified Units.
Address Instruction Operands
00000 LD 000000
00001 IOSP(187)
Description
Flags
Network Instructions Section 5-36