4 INTELLIGENT COMMUNICATION MODULE REPLACEMENT
4 - 3
(2) Replacement of intelligent communication module A1SD51S
: Compatible, : Partial change required, ×: Incompatible
Item
Specifications
Compat-
ibility
Precautions for replacement
A1SD51S
QD51
QD51-R24
Programming language AD51H-BASIC (interpreter, compile)
Number of tasks 2
Task start conditions
• Start at power on
• Start by interrupt from the programmamble controller CPU (This cannot
be performed when Compiler BASIC is used.)
• Start by start request from another task
Internal
memory
Program
Max. 64K bytes
(16/32/48/64K bytes selectable for one task.)
×
Review the BASIC program, and
reduce the memory size to 64K
bytes or less.
Common
memory
8K bytes
Buffer
memory
6K bytes
Extension
relay (EM)
1024 points
Extension
register (ED)
1024 points
General input/output
Input: 27 points
Output: 26 points
(9 points: For task start from the PLC
CPU.)
Input: 26 points
Output: 23 points
(2 points: For task start from the PLC
CPU.)
×
Change I/O signals with a
program.
Memory protection
Yes
(E
2
PROM write protectable)
Yes
(Flash ROM write protectable)
Interface
RS-232 2 channels
QD51: 2channels
QD51-R24: 1 channel
The cable connector must be
changed.
RS-422/485 1 channel
QD51: -
QD51-R24: 1 channel
Use the QD51-R24.
Clock function None
Power failure protection
Yes
(common memory, extension relay,
extension register)
None Refer to Section 4.6.2 (4).
User program in ROM
Possible
(Stored in the built-in EEP-ROM)
Possible
(Stored in the built-in flash ROM)
Console
•A7PHP
•A7HGP
• A7LMS
•VG-620
•VT-382
• IBM-PC/AT-compatible personal
computer
• IBM-PC/AT-compatible personal
computer
Use an IBM-PC/AT-compatible
personal computer.
The AD51H-BASIC software
package can be used with the
QD51(-R24). (This package can
be also used with the A series.)
Multitask debugging Possible (when a debugger is used.)
I/O points occupied
32 points
(I/O assignment: special 32 points)
32 points
(I/O assignment: intelli 32 points)
No. of slots 1 slot
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