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2-4-1 Hardware and Software Settings
The hardware and software settings related to Memory Cassette operations are
described below.
Switch Settings Switch 1 on the Memory Cassette is turned OFF when the Memory Cassette is
shipped. Check the setting on switch 1 before installation.
Memory
Cassette
Switch 1
setting
Function
EEPROM
ON The data in the Memory Cassette is write-protected.
OFF The data in the Memory Cassette can be overwritten.
EPROM
ON 27512-equivalent ROM-KD-B EPROM
(32K words, 150 ns access time)
OFF 27256-equivalent ROM-JD-B EPROM
(16K words, 150 ns access time)
SR 269 through SR 273 contain flags and control bits related to Memory Cas-
sette contents and operation. Refer to 3-4 SR (Special Relay) Area for details.
2-4-2 Writing/Reading UM Data
Use the following procedures to transfer UM data to or from a Memory Cassette.
(A PROM writer is required to write data to an EPROM Memory Cassette. Refer
to the SYSMAC Support Software Operation Manual for details.)
Note UM contains the ladder program, fixed DM (such as the PC Setup), expansion
DM, I/O comments, the I/O table, and the UM area allocation information.
Use the following procedure to write UM data to an EEPROM Memory Cassette.
1, 2, 3... 1. Before turning ON the C200HX/HG/HE’s power supply, make sure that
switch 1 on the Memory Cassette is set to OFF.
2. Turn ON the C200HX/HG/HE and write the ladder program or read an exist-
ing program from a data disk.
3. Switch the C200HX/HG/HE to PROGRAM mode.
4. Use a host computer running SSS or a Programming Console to turn ON
SR 27000 (the Save UM to Cassette Bit). The data will be written from the
PC to the Memory Cassette. SR 27000 will be turned OFF automatically af-
ter the data transfer has been completed.
5. If you want to write-protect the data on the Memory Cassette, turn OFF the
PC and set switch 1 of the Memory Cassette to ON. If this switch is ON, data
in the Memory Cassette will be retained even if SR 27000 is turned ON.
There are two ways to read UM data from a Memory Cassette: automatic trans-
fer at startup or a one-time transfer using a Peripheral Device.
(There is no function that automatically writes data to the Memory Cassette.)
Automatic Transfer at Startup:
1, 2, 3... 1. Turn ON pin 2 of the CPU Unit’s DIP switch.
2. Install the Memory Cassette containing the data into the C200HX/HG/HE.
3. Turn ON the C200HX/HG/HE’s power supply. The contents of the Memory
Cassette will be transferred to the CPU Unit automatically. A memory error
will occur if the data couldn’t be transferred.
One-time Transfer using a Peripheral Device:
1, 2, 3... 1. Install the Memory Cassette containing the data into the C200HX/HG/HE.
2. Turn ON the C200HX/HG/HE and switch it to PROGRAM mode.
3. Use a host computer running SSS or a Programming Console to turn ON
SR 27001 (the Load UM from Cassette Bit). The data will be read from the
Memory Cassette to the PC. SR 27001 will be turned OFF automatically af-
ter the data transfer has been completed.
SR Area Flags and Control
Bits
Writing UM Data to a
Memory Cassette
Reading UM Data from a
Memory Cassette
Memory Cassettes Section 2-4