Maple Systems OIT Family (ASCII) User Manual

Page 10

Resend Last Transmission Command

ESC

Q terminator

Description: Causes the OIT to resend the last transmission the OIT sent to the ASCII

host. This command can be used to validate the data sent to the ASCII host from a

prior response

Response: errorcode lasttransmission lineterminator

last transmission = The last transmission the OIT sent to the ASCII host.

Read OIT Memory Command

ESC

R memarea memaddr length terminator

mem area = C or D (register bank)

mem addr = 0000 to 1023 (The address is in decimal, base 10, format and must be

four digits. For example, send 0010, not 10.)

length =

1 means read one bit

2 means read one byte

3 means read two bytes

4 means read four bytes

Description: Reads from the OIT’s internal data or coil registers.

Response: errorcode data lineterminator

data =

if length = 1 for a C register, the OIT returns the bit value of the C

if length = 1 for a D register, the OIT returns the bit value of the least

significant bit in the D register as a 1 or 0

if length = 2 for a C register, the OIT returns the value of eight

consecutive C registers using two ASCII bytes to represent the

hexadecimal number (range of 00 to FF) with the specified address as

the least significant bit

if length = 2 for a D register, the OIT returns the value of the eight least

significant bits in the D register using two ASCII bytes to represent the

hexadecimal number (range of 00 to FF)

if length = 3 for a C register, the OIT returns the value of sixteen

consecutive C registers using four ASCII bytes to represent the

hexadecimal number (range of 0000 to FFFF) with the specified address

as the least significant bit

if length = 3 for a D register, the OIT returns the word (16 bit) value

of the D register using four ASCII bytes to represent the hexadecimal

number (range of 0000 to FFFF)

if length = 4 for a C register, the OIT returns the value of thirty-two

consecutive C registers using eight ASCII bytes to represent the

hexadecimal number (range of 00000000 to FFFFFFFF) with the

specified address as the least significant bit

if length = 4 for a D register, the OIT returns the long word (32 bit)

value of two consecutive D register using eight ASCII bytes to

represent the hexadecimal number (range of 00000000 to FFFFFFFF)

with the specified address as the least significant word

OPERATION

1010-0088, REV02