XP GLASSMAN EJ Series User Manual

Series EJ, ET, EY, FJ & FR
102002-177 Rev M2
51
\1020\02177M2.doc 17 Jun 2019
RESPONSE PACKET (“R”)
The 16 byte Response Packet will be returned to the computer in response to a valid
Query command. It will contain status information in the following order:
Note that the analog monitors have 10 bit resolution, therefore, full scale is
represented in hexadecimal as 3FF. The checksum is calculated on bytes
2 through 13.
The 12 digital monitor status bits are sent as three ASCII characters. The bit
assignments are as follows:
Byte 11:
Bit 0 Control Mode: Voltage Mode = 0, Current Mode = 1
Bit 1 Power Supply Fault (1 = Fault)
Bit 2 HV On Indicator (1 = on)
Bit 3 Unused=
Byte 12:
Bit 0 Unused=
Bit 1 Unused=
Bit 2 Unused =
Bit 3 Unused =
Byte 13:
Bit 0 Unused =
Bit 1 Unused =
Bit 2 Unused =
Bit 3 Unused =
For example, a monitored voltage of Vmax will correspond to 3FF hex, sent with
ACII encoding as follows:
Byte 2: 33 hex (00110011 binary)
Byte 3: 46 hex (01000110 binary)
Byte 4: 46 hex (01000110 binary)
BYTE #
DESCRIPTION
1
Response identifier character “R”
2-4
Voltage monitor(0 – Vmax) corresponds to (0 – 3FF) hex.
5-7
Current monitor(0 – Imax) corresponds to (0 – 3FF) Hex.
8-10
Reserved, Set to 0 decimal = 30 hex.
11-13
Digital monitors (12 bits encoded in three ASCII bytes)
14-15
Modulo 256 checksum of bytes 2 –13
16
End of message character (carriage return, hex 0D)
Table 7. Response Packet Byte Contents

XP GLASSMAN EJ Series Specifications

General

Brand	XP
Model	GLASSMAN EJ Series
Category	Power Supply
Language	English