Aprilaire 8800 User Manual

MESSAGING COMMANDS
PMES1, PMES2, PMES3, PMES4
Permanent messages COS: N/A
Permissions: Read/Write
Query
Command
Syntax: SN[#] PMES[n]?<CR>
Description: Requests the message string for permanent message [n].
Assignment
Command
Syntax: SN[#] PMES[n]=[string]<CR>
Description: Sets the message string for permanent message [n] to [string].
Response Syntax: SN[#] PMES[n]=[string]<CR>
Example: SN1 PMES1=CURRENT STATUS AUTO<CR>
Node address 1 responds with a permanent message 1 string of “CURRENT STATUS AUTO”.
Parameters Range
string: message string [null, 31 ASCII character string]
Up to four messages are displayed on a rotating basis. The message center is a two-line, character display with a total of 31 characters
(16-top, 15-bottom line). The top line of the display is filled first followed with the remainder of the characters on the bottom line. Blanks
(spaces) count as characters. Each message is displayed for 2 seconds, after which, the next message is displayed. If the message is NULL or
is filled with nothing but spaces, then the message is skipped in the sequence. If only one message is available, it is permanently displayed.
The characters in the text string are limited to alphanumeric characters uppercase only. If an assignment command is received with a null
string, the default message is displayed. The default messages are:
Message Default String
1 NULL
2 NULL
3 NULL
4 NULL
TMPMES
Temporary message COS: N/A
Permissions: Read/Write
Query
Command
Syntax: SN[#] TMPMES?<CR>
Description: Requests the temporary message string.
Assignment
Command
Syntax: SN[#] TMPMES=[string]<CR>
Description: Sets the message string for the temporary message to [string].
Response Syntax: SN[#] TMPMES=[string]<CR>
Example: SN1 TMPMES=RESET FILTER<CR>
Node address 1 responds with a temporary message string of “RESET FILTER”.
Parameters Range
string: message string [null, 31 ASCII character string]
With this command, messages can be shown in the message center that override the permanent message display. The message center is
a two-line, character display with a total of 31 characters (16-top, 15-bottom line). The top line of the display is filled first followed with
the remainder of the characters on the bottom line. Blanks (spaces) count as characters. When an assignment command is received, the
permanent message sequence is suspended by the temporary message. The backlight turns on and off (5 seconds on, 2 seconds off) ten
times. The temporary message is displayed until an assignment command is received with a null string. The characters in the text string are
limited to alphanumeric characters uppercase only.
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Aprilaire 8800 Specifications

Thermal Specifications

control temperature range	45º to 99ºF (7º to 32ºC)
display temperature range	32º to 99ºF (0º to 40ºC)
accuracy	± 1ºF (± .5ºC)

Operating Environment

storage temperature	-30º to 140ºF (-34.4º to 60ºC)
operating humidity	5% to 90% relative humidity
operating ambient temperature	32º to 120ºF (0º to 48.9ºC)

Electrical Specifications

voltage AC	24 VAC (18-30 VAC)
maximum load per terminal	1 amp
total maximum load	2.5 amp

Screen

screen size	10.3 sq. in.
backlit	constant low intensity light option
font size	large

Weight and Dimensions

height	4 15/16 inches
width	6 inches
depth	1 5/16 inches