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(187)
IOSP
0000
00
(188)
IORS
0000
01
386
IOSP(187) is designed to temporarily disable access, e.g., during read/write op-
erations. Servicing of CPU Bus Units, the host link interface, and Programming
Devices can be disabled for longer intervals by turning ON the bits shown in the
following table. These bits can be turned ON at the beginning of the user pro-
gram to more permanently disable memory access than is possible with
IOSP(187), which is effective only until the next IORS(188) or END(01) instruc-
tion (or until power is turned OFF).
Bit(s)
Name
Function
A01500 to
A01515
CPU Service Disable
Bits
Turned ON to stop service to CPU Bus Units
numbered #0 through #15, respectively.
A01703
Host Link Service
Disable Bit
Turned ON to stop Host Link and NT Link Sys-
tem servicing.
A01704
Programming Device
Service Disable Bit
Turned ON to stop service to Programming
Devices.
There are no flags affected by this instruction.
Example
When CIO 000000 is ON in the following example, memory access is disabled
from Programming Devices, through communications systems, and from other
specified Units.
Address
Instruction
Operands
00000
LD
000000
00001
IOSP(187)
5-34-2 ENABLE ACCESS: IORS(188)
(188)
IORS
Ladder Symbol
When the execution condition is OFF, IORS(188) is not executed. When the ex-
ecution condition is ON, both read and write access to PC memory from Pro-
gramming Devices, CPU Bus Units, and Communications Units is enabled.
There are no flags affected by this instruction.
Example
When CIO 000001 is ON in the following example, memory access is enabled.
Address
Instruction
Operands
00000
LD
000000
00001
IORS(188)
5-34-3 DISPLAY MESSAGE: MSG(195)
(195)
MSG
N
M
M: 1
st
message word
CIO, G, A, T, C, #, DM
N: Message number
CIO, G, A, T, C, #, DM, DR, IR
Operand Data Areas
Ladder Symbol
Variations
j
MSG(195)
When the execution condition is OFF, MSG(195) is not executed. When ex-
ecuted with an ON execution condition, MSG(195) reads sixteen words of ex-
tended ASCII from M to M+15 and displays the message on the SSS screen or
other Programming Device. The displayed message can be up to 32 characters
long, i.e., each ASCII character code requires eight bits (two hexadecimal dig-
its). Refer to Appendix H for the extended ASCII codes. Japanese katakana
characters are included in this code.
Flags
Description
Flags
Description
Network Instructions
Section 5-34
Summary of Contents for CVM1D
Page 462: ...SYSMAC CVM1D Duplex System Programmable Controllers Operation Manual Revised August 2001...
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