308
Peripheral Servicing Priority Mode Section 6-9
PLC Setup Settings The following settings must be made in the PLC Setup to use the Peripheral
Servicing Priority Mode.
• Slice Time for Program Execution: 5 to 255 ms in 1-ms increments
• Slice Time for Peripheral Servicing: 0.1 to 25.5 ms in 0.1-ms increments
• Units and/or Ports for Priority Servicing:CPU Bus Unit (by unit No.)
CS/CJ Special I/O Unit (by unit
No.)
Inner Board (CS Series only)
RS-232C port
Peripheral port
• Operation and errors will be as shown below depending on the settings in
the PLC Setup.
• The setting cannot be made from the CX-Programmer.
Note If an error is detected in the PLC Setup, A40210 will turn ON and a non-fatal
error will occur.
Address in Pro-
gramming Console
Settings Default Function New set-
ting’s effec-
tiveness
Word Bit(s)
219 08 to
15
00
05 to FF
(Hex)
00 00: Disable priority mode servicing
05 to FF: Time slice for instruction execution
(5 to 255 ms in 1-ms increments)
Takes effect
at the start
of operation
(Can’t be
changed
during oper-
ation.)
00 to
07
00 to FF
(Hex)
00 00: Disable priority mode servicing
01 to FF: Time slice for peripheral servicing
(0.1 to 25.5 ms in 0.1-ms increments)
220 08 to
15
00
10 to 1F
20 to 2F
E1
FC
FD (Hex)
00 00: Disable priority mode servicing
10 to 1F: CPU Bus Unit unit number + 10 (Hex)
20 to 7F: CS/CJ Special I/O Unit unit number + 20 (Hex)
E1: Inner Board
FC: RS-232C port
FD: Peripheral port
00 to
07
00
221 08 to
15
00
00 to
07
00
222 08 to
15
00
Conditions CPU Unit operation PLC Setup errors
Time Slice for
Peripheral
Servicing
Time Slice for
Instruction
Execution
Specified Units
and Ports
01 to FF: (0.1 to
25.5 ms)
05 to FF: (5 to
255 ms)
All correct settings Peripheral Servicing Priority
Mode
None
00 and correct set-
tings
Correct, but
redundant settings
Some illegal set-
tings
Peripheral Servicing Priority
Mode for items with correct
settings
Generated
All 00 settings Normal operation Generated
00 and illegal set-
tings
All illegal settings
00 00 --- Normal operation None
Any other --- Normal operation Generated
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